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Memory exhaustion in jackson-core's non-blocking async parser allows remote unauthenticated attackers to exhaust JVM heap by streaming JSON integer digit sequences in small chunks without ever sending a terminator byte. The prior fix for GHSA-72hv-8253-57qq (CVE-2026-18401) failed to insert a `validateIntegerLength()` call on the `NOT_AVAILABLE` return path inside `MINOR_NUMBER_INTEGER_DIGITS`, allowing the internal `TextBuffer` accumulator to grow bounded only by `maxStringLength` (20 MiB default) rather than `maxNumberLength` (1000 chars default) - a ~20,000x amplification yielding approximately 40 MiB of heap pressure per connection due to Java's 2-byte char representation. Reactive frameworks that feed inbound HTTP or gRPC bytes incrementally to the async parser - Spring WebFlux/Reactor, Quarkus, Helidon, and Vert.x - are the primary risk surface; no public exploit identified at time of analysis.
Allowlist bypass in jackson-databind's BasicPolymorphicTypeValidator (PTV) allows attackers to instantiate non-allowlisted classes by wrapping them in arrays (e.g., EvilType[]), defeating a control intended to block deserialization gadget chains. Affects versions 2.10.0 through 2.18.7, 2.19.0 through 2.21.3, and 3.0.0 through 3.1.3 when applications use allowIfSubTypeIsArray() alongside an explicit concrete-type allowlist. No public exploit identified at time of analysis, but the upstream fix and full root-cause writeup are public on GitHub.
PolymorphicTypeValidator bypass in jackson-databind versions 2.10.0 through 2.18.7, 2.19.0 through 2.21.3, and 3.0.0 through 3.1.3 allows attackers controlling JSON type identifiers to smuggle denied gadget classes through allow-listed generic containers, leading to arbitrary class instantiation and potential remote code execution. The flaw stems from DatabindContext._resolveAndValidateGeneric() validating only the raw container class name while skipping all nested generic type arguments. No public exploit identified at time of analysis, but the GHSA advisory includes a proof-of-concept configuration and payload structure.
Uncontrolled-recursion denial of service in FasterXML jackson-core 3.0.0 through 3.0.x lets a remote attacker crash JSON-processing services by submitting a deeply nested JSON document. The UTF8DataInputJsonParser (DataInput sources) and ReaderBasedJsonParser fail to enforce the StreamReadConstraints maxNestingDepth limit (default 500), so excessive nesting drives a StackOverflowError. No public exploit identified at time of analysis and EPSS is low (0.06%), but the bug is trivially triggerable against any service that parses untrusted JSON with these parsers; fixed in 3.1.0.
jackson-databind's NioPathDeserializer passes attacker-controlled URI strings from untrusted JSON through an unrestricted URI scheme resolution pipeline, allowing selection and invocation of arbitrary registered FileSystemProvider implementations at deserialization time. Affected versions span com.fasterxml.jackson.core:jackson-databind 2.8.0 through the pre-2.18.10/2.21.6/2.22.2 ranges and tools.jackson.core:jackson-databind 3.0.0 through the pre-3.1.6/3.2.2 ranges. With only JDK built-in providers present the immediate impact is a limited availability concern; with third-party FileSystemProviders such as S3 or HDFS adapters on the classpath, attackers can trigger side-effecting provider operations via crafted JSON fields. No public exploit has been identified at time of analysis and this vulnerability is not listed in CISA KEV.
DNS-based server-side request forgery in jackson-databind exposes any Java application that deserializes user-supplied JSON into objects containing `java.net.InetAddress`-typed fields, causing the library to perform unsolicited outbound DNS lookups against attacker-controlled hostnames. Affected across all major release lines from 2.x through 3.x (com.fasterxml and tools.jackson.core artifact groups), the flaw allows unauthenticated remote attackers to enumerate internal hostnames and map internal network topology via DNS side-channels. No active exploitation or public exploit code has been identified; vendor patches are available across all affected release lines.
Denial of service in FasterXML jackson-core's non-blocking (async) JSON parser allows unauthenticated network attackers to exhaust JVM heap and CPU by submitting JSON containing arbitrarily long number tokens that bypass the maxNumberLength constraint. Affected deployments are those using the async parser API - particularly reactive frameworks such as Spring WebFlux - running com.fasterxml.jackson.core:jackson-core 2.15.0-2.18.5 or 2.19.0-2.21.0, or tools.jackson.core:jackson-core 3.0.0-3.0.x. Publicly available exploit code exists (PoC JUnit test published in GHSA-72hv-8253-57qq); the vulnerability is not listed in the CISA KEV catalog at time of analysis.
jackson-databind's @JsonView authorization guard is bypassable on deserialization when a property carries both @JsonView and @JsonUnwrapped annotations, allowing an authenticated or unauthenticated attacker to mass-assign privileged fields through a less-privileged active view. Affected are com.fasterxml.jackson.core:jackson-databind 2.18.0-2.18.8, 2.21.0-2.21.4, 2.22.0, and tools.jackson.core:jackson-databind 3.0.0-3.1.4, 3.2.0. A publicly available proof-of-concept demonstrates the bypass; SSVC reports no confirmed active exploitation at time of analysis, and EPSS sits at 0.42% (34th percentile), indicating low current threat velocity despite the high-integrity impact.
Deserialization logic in FasterXML jackson-databind 2.15.0 through 2.18.7, 2.21.3, and 3.1.3 allows unauthenticated remote callers to bypass @JsonIgnore annotations on Java Record types when a PropertyNamingStrategy is configured. The renamed JSON key - e.g., 'internal_role' produced by SnakeCaseStrategy from 'internalRole' - is not registered in the ignore list, so Jackson's constructor-parameter binding accepts the attacker-supplied value despite the developer's explicit exclusion directive. No public exploit tooling has been identified at time of analysis, but the upstream fix PR includes a runnable proof-of-concept test that fully demonstrates the bypass, lowering the bar for independent reproduction.
@JsonView access-control bypass in jackson-databind 2.21.0-2.21.3 and 3.0.0-3.1.3 allows remote attackers to write values into setterless Collection/Map properties that are restricted by a @JsonView annotation, defeating view-based mass-assignment protection during deserialization. The regression was introduced when SetterlessProperty.isMerging() was changed to return true, routing these properties through an unguarded buffering branch in BeanDeserializer._deserializeUsingPropertyBased that lacked the prop.visibleInView(activeView) check applied to creator properties. No public exploit code has been identified and this is not listed in CISA KEV; however, applications relying on @JsonView for security-critical field-level access control - such as role or permission gating - are directly and completely bypassed.
Integrity bypass in jackson-databind 2.21.0-2.21.3 and 3.0.0-3.1.3 allows unauthenticated network attackers to write to private backing fields that application developers intended as read-only. The flaw occurs when a POJO uses @JsonProperty on a getter with @JsonIgnore on the setter - a common read-only-over-the-wire pattern - and MapperFeature.INFER_PROPERTY_MUTATORS is enabled (the default). No public exploit code has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog. The GHSA advisory characterizes the impact as property tampering and mass assignment; maintainers rate it minor despite a reporter-assessed HIGH severity.
Per-property @JsonIgnoreProperties filtering in jackson-databind is silently bypassed when the same property also carries @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES), enabling unauthenticated network attackers (per CVSS AV:N/PR:N) to write to fields the application explicitly excluded from deserialization. The flaw spans versions from 2.8.0 through the 2.18.x, 2.19-2.21.x, and 3.1.x release lines and constitutes a mass-assignment integrity risk wherever ignored fields guard sensitive state such as privilege or role attributes. No public exploit tool or CISA KEV listing has been identified at time of analysis; vendor-released patches (2.18.9, 2.21.5, 3.1.4) were published 2026-06-04.
Eager DNS resolution during InetSocketAddress deserialization in jackson-databind (versions 2.0.0 through pre-fix releases across the 2.18, 2.21, and 3.x lines) allows any attacker who can supply untrusted JSON to an affected endpoint to force outbound DNS lookups for attacker-chosen hostnames at readValue() time - before application validation or connect logic can intervene. This DNS-based SSRF (CWE-918) enables internal resolver probing, network topology enumeration, and DNS out-of-band interaction signals against applications that deserialize untrusted JSON into types containing InetSocketAddress fields. No public exploit code and no CISA KEV listing have been identified at time of analysis; EPSS data was not available in the provided intelligence sources.
Uncontrolled resource consumption in jackson-databind 2.10.0 through 2.13.5 allows unauthenticated remote attackers to cause a Denial-of-Service by submitting small (~2kB), deeply nested JSON payloads that trigger a StackOverflowError when a service reads the input via ObjectMapper.readTree() and serializes the resulting JsonNode using JsonNode.toString(). The root cause is recursive serialization in the toString() call path, which was replaced with an iterative IteratorStack-based implementation in version 2.14.0. No public exploit code has been identified at time of analysis, and active exploitation has not been confirmed by CISA KEV.
Those using jackson-dataformats-text to parse TOML data may be vulnerable to Denial of Service attacks (DOS). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
jackson-databind through 2.15.2 allows attackers to cause a denial of service or other unspecified impact via a crafted object that uses cyclic dependencies. Rated medium severity (CVSS 4.7). No vendor patch available.
In FasterXML jackson-databind before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
In FasterXML jackson-databind before versions 2.13.4.1 and 2.12.17.1, resource exhaustion can occur because of a lack of a check in primitive value deserializers to avoid deep wrapper array nesting,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Those using Woodstox to parse XML data may be vulnerable to Denial of Service attacks (DOS) if DTD support is enabled. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A flaw was found in jackson-databind before 2.9.10.7. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.docx4j.org.apache.xalan.lib.sql.JNDIConnectionPool. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to com.oracle.wls.shaded.org.apache.xalan.lib.sql.JNDIConnectionPool (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Epss exploitation probability 41.1%.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.dbcp2.datasources.SharedPoolDataSource. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.dbcp2.datasources.PerUserPoolDataSource. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
A flaw was found in FasterXML Jackson Databind, where it did not have entity expansion secured properly. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.
FasterXML jackson-databind 2.x before 2.9.10.6 mishandles the interaction between serialization gadgets and typing, related to com.pastdev.httpcomponents.configuration.JndiConfiguration. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.6 mishandles the interaction between serialization gadgets and typing, related to br.com.anteros.dbcp.AnterosDBCPDataSource (aka Anteros-DBCP). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to org.jsecurity.realm.jndi.JndiRealmFactory (aka org.jsecurity). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to oadd.org.apache.xalan.lib.sql.JNDIConnectionPool (aka apache/drill). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to com.sun.org.apache.xalan.internal.lib.sql.JNDIConnectionPool (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to oracle.jms.AQjmsQueueConnectionFactory,. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.jelly.impl.Embedded (aka commons-jelly). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.springframework.aop.config.MethodLocatingFactoryBean (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.openjpa.ee.WASRegistryManagedRuntime (aka openjpa). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 60.7%.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.proxy.provider.remoting.RmiProvider (aka. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.activemq.* (aka activemq-jms, activemq-core, activemq-pool,. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to javax.swing.JEditorPane. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.aoju.bus.proxy.provider.remoting.RmiProvider (aka bus-proxy). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.caucho.config.types.ResourceRef (aka caucho-quercus). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.aries.transaction.jms.internal.XaPooledConnectionFactory (aka. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to br.com.anteros.dbcp.AnterosDBCPConfig (aka anteros-core). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig (aka. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.hadoop.shaded.com.zaxxer.hikari.HikariConfig (aka shaded. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.0.0 through 2.9.10.2 lacks certain xbean-reflect/JNDI blocking, as demonstrated by org.apache.xbean.propertyeditor.JndiConverter. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A flaw was found in org.codehaus.jackson:jackson-mapper-asl:1.9.x libraries. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
SubTypeValidator.java in FasterXML jackson-databind before 2.9.9.2 mishandles default typing when ehcache is used (because of net.sf.ehcache.transaction.manager.DefaultTransactionManagerLookup),. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) vulnerability could allow attackers to modify object prototypes to inject properties affecting application logic.
FasterXML jackson-databind 2.x before 2.9.9.1 might allow attackers to have a variety of impacts by leveraging failure to block the logback-core class from polymorphic deserialization. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Fasterxml Jackson version Before 2.9.8 contains a CWE-20: Improper Input Validation vulnerability in Jackson-Modules-Java8 that can result in Causes a denial-of-service (DoS). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
FasterXML jackson-databind before 2.7.9.3, 2.8.x before 2.8.11.1 and 2.9.x before 2.9.5 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 deserialization. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
FasterXML jackson-databind through 2.8.11 and 2.9.x through 2.9.3 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 and CVE-2017-17485 deserialization. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
XmlMapper in the Jackson XML dataformat component (aka jackson-dataformat-xml) before 2.7.8 and 2.8.x before 2.8.4 allows remote attackers to conduct server-side request forgery (SSRF) attacks via. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.
XML external entity (XXE) vulnerability in XmlMapper in the Data format extension for Jackson (aka jackson-dataformat-xml) allows attackers to have unspecified impact via unknown vectors. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Memory exhaustion in jackson-core's non-blocking async parser allows remote unauthenticated attackers to exhaust JVM heap by streaming JSON integer digit sequences in small chunks without ever sending a terminator byte. The prior fix for GHSA-72hv-8253-57qq (CVE-2026-18401) failed to insert a `validateIntegerLength()` call on the `NOT_AVAILABLE` return path inside `MINOR_NUMBER_INTEGER_DIGITS`, allowing the internal `TextBuffer` accumulator to grow bounded only by `maxStringLength` (20 MiB default) rather than `maxNumberLength` (1000 chars default) - a ~20,000x amplification yielding approximately 40 MiB of heap pressure per connection due to Java's 2-byte char representation. Reactive frameworks that feed inbound HTTP or gRPC bytes incrementally to the async parser - Spring WebFlux/Reactor, Quarkus, Helidon, and Vert.x - are the primary risk surface; no public exploit identified at time of analysis.
Allowlist bypass in jackson-databind's BasicPolymorphicTypeValidator (PTV) allows attackers to instantiate non-allowlisted classes by wrapping them in arrays (e.g., EvilType[]), defeating a control intended to block deserialization gadget chains. Affects versions 2.10.0 through 2.18.7, 2.19.0 through 2.21.3, and 3.0.0 through 3.1.3 when applications use allowIfSubTypeIsArray() alongside an explicit concrete-type allowlist. No public exploit identified at time of analysis, but the upstream fix and full root-cause writeup are public on GitHub.
PolymorphicTypeValidator bypass in jackson-databind versions 2.10.0 through 2.18.7, 2.19.0 through 2.21.3, and 3.0.0 through 3.1.3 allows attackers controlling JSON type identifiers to smuggle denied gadget classes through allow-listed generic containers, leading to arbitrary class instantiation and potential remote code execution. The flaw stems from DatabindContext._resolveAndValidateGeneric() validating only the raw container class name while skipping all nested generic type arguments. No public exploit identified at time of analysis, but the GHSA advisory includes a proof-of-concept configuration and payload structure.
Uncontrolled-recursion denial of service in FasterXML jackson-core 3.0.0 through 3.0.x lets a remote attacker crash JSON-processing services by submitting a deeply nested JSON document. The UTF8DataInputJsonParser (DataInput sources) and ReaderBasedJsonParser fail to enforce the StreamReadConstraints maxNestingDepth limit (default 500), so excessive nesting drives a StackOverflowError. No public exploit identified at time of analysis and EPSS is low (0.06%), but the bug is trivially triggerable against any service that parses untrusted JSON with these parsers; fixed in 3.1.0.
jackson-databind's NioPathDeserializer passes attacker-controlled URI strings from untrusted JSON through an unrestricted URI scheme resolution pipeline, allowing selection and invocation of arbitrary registered FileSystemProvider implementations at deserialization time. Affected versions span com.fasterxml.jackson.core:jackson-databind 2.8.0 through the pre-2.18.10/2.21.6/2.22.2 ranges and tools.jackson.core:jackson-databind 3.0.0 through the pre-3.1.6/3.2.2 ranges. With only JDK built-in providers present the immediate impact is a limited availability concern; with third-party FileSystemProviders such as S3 or HDFS adapters on the classpath, attackers can trigger side-effecting provider operations via crafted JSON fields. No public exploit has been identified at time of analysis and this vulnerability is not listed in CISA KEV.
DNS-based server-side request forgery in jackson-databind exposes any Java application that deserializes user-supplied JSON into objects containing `java.net.InetAddress`-typed fields, causing the library to perform unsolicited outbound DNS lookups against attacker-controlled hostnames. Affected across all major release lines from 2.x through 3.x (com.fasterxml and tools.jackson.core artifact groups), the flaw allows unauthenticated remote attackers to enumerate internal hostnames and map internal network topology via DNS side-channels. No active exploitation or public exploit code has been identified; vendor patches are available across all affected release lines.
Denial of service in FasterXML jackson-core's non-blocking (async) JSON parser allows unauthenticated network attackers to exhaust JVM heap and CPU by submitting JSON containing arbitrarily long number tokens that bypass the maxNumberLength constraint. Affected deployments are those using the async parser API - particularly reactive frameworks such as Spring WebFlux - running com.fasterxml.jackson.core:jackson-core 2.15.0-2.18.5 or 2.19.0-2.21.0, or tools.jackson.core:jackson-core 3.0.0-3.0.x. Publicly available exploit code exists (PoC JUnit test published in GHSA-72hv-8253-57qq); the vulnerability is not listed in the CISA KEV catalog at time of analysis.
jackson-databind's @JsonView authorization guard is bypassable on deserialization when a property carries both @JsonView and @JsonUnwrapped annotations, allowing an authenticated or unauthenticated attacker to mass-assign privileged fields through a less-privileged active view. Affected are com.fasterxml.jackson.core:jackson-databind 2.18.0-2.18.8, 2.21.0-2.21.4, 2.22.0, and tools.jackson.core:jackson-databind 3.0.0-3.1.4, 3.2.0. A publicly available proof-of-concept demonstrates the bypass; SSVC reports no confirmed active exploitation at time of analysis, and EPSS sits at 0.42% (34th percentile), indicating low current threat velocity despite the high-integrity impact.
Deserialization logic in FasterXML jackson-databind 2.15.0 through 2.18.7, 2.21.3, and 3.1.3 allows unauthenticated remote callers to bypass @JsonIgnore annotations on Java Record types when a PropertyNamingStrategy is configured. The renamed JSON key - e.g., 'internal_role' produced by SnakeCaseStrategy from 'internalRole' - is not registered in the ignore list, so Jackson's constructor-parameter binding accepts the attacker-supplied value despite the developer's explicit exclusion directive. No public exploit tooling has been identified at time of analysis, but the upstream fix PR includes a runnable proof-of-concept test that fully demonstrates the bypass, lowering the bar for independent reproduction.
@JsonView access-control bypass in jackson-databind 2.21.0-2.21.3 and 3.0.0-3.1.3 allows remote attackers to write values into setterless Collection/Map properties that are restricted by a @JsonView annotation, defeating view-based mass-assignment protection during deserialization. The regression was introduced when SetterlessProperty.isMerging() was changed to return true, routing these properties through an unguarded buffering branch in BeanDeserializer._deserializeUsingPropertyBased that lacked the prop.visibleInView(activeView) check applied to creator properties. No public exploit code has been identified and this is not listed in CISA KEV; however, applications relying on @JsonView for security-critical field-level access control - such as role or permission gating - are directly and completely bypassed.
Integrity bypass in jackson-databind 2.21.0-2.21.3 and 3.0.0-3.1.3 allows unauthenticated network attackers to write to private backing fields that application developers intended as read-only. The flaw occurs when a POJO uses @JsonProperty on a getter with @JsonIgnore on the setter - a common read-only-over-the-wire pattern - and MapperFeature.INFER_PROPERTY_MUTATORS is enabled (the default). No public exploit code has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog. The GHSA advisory characterizes the impact as property tampering and mass assignment; maintainers rate it minor despite a reporter-assessed HIGH severity.
Per-property @JsonIgnoreProperties filtering in jackson-databind is silently bypassed when the same property also carries @JsonFormat(ACCEPT_CASE_INSENSITIVE_PROPERTIES), enabling unauthenticated network attackers (per CVSS AV:N/PR:N) to write to fields the application explicitly excluded from deserialization. The flaw spans versions from 2.8.0 through the 2.18.x, 2.19-2.21.x, and 3.1.x release lines and constitutes a mass-assignment integrity risk wherever ignored fields guard sensitive state such as privilege or role attributes. No public exploit tool or CISA KEV listing has been identified at time of analysis; vendor-released patches (2.18.9, 2.21.5, 3.1.4) were published 2026-06-04.
Eager DNS resolution during InetSocketAddress deserialization in jackson-databind (versions 2.0.0 through pre-fix releases across the 2.18, 2.21, and 3.x lines) allows any attacker who can supply untrusted JSON to an affected endpoint to force outbound DNS lookups for attacker-chosen hostnames at readValue() time - before application validation or connect logic can intervene. This DNS-based SSRF (CWE-918) enables internal resolver probing, network topology enumeration, and DNS out-of-band interaction signals against applications that deserialize untrusted JSON into types containing InetSocketAddress fields. No public exploit code and no CISA KEV listing have been identified at time of analysis; EPSS data was not available in the provided intelligence sources.
Uncontrolled resource consumption in jackson-databind 2.10.0 through 2.13.5 allows unauthenticated remote attackers to cause a Denial-of-Service by submitting small (~2kB), deeply nested JSON payloads that trigger a StackOverflowError when a service reads the input via ObjectMapper.readTree() and serializes the resulting JsonNode using JsonNode.toString(). The root cause is recursive serialization in the toString() call path, which was replaced with an iterative IteratorStack-based implementation in version 2.14.0. No public exploit code has been identified at time of analysis, and active exploitation has not been confirmed by CISA KEV.
Those using jackson-dataformats-text to parse TOML data may be vulnerable to Denial of Service attacks (DOS). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
jackson-databind through 2.15.2 allows attackers to cause a denial of service or other unspecified impact via a crafted object that uses cyclic dependencies. Rated medium severity (CVSS 4.7). No vendor patch available.
In FasterXML jackson-databind before 2.13.4, resource exhaustion can occur because of a lack of a check in BeanDeserializer._deserializeFromArray to prevent use of deeply nested arrays. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
In FasterXML jackson-databind before versions 2.13.4.1 and 2.12.17.1, resource exhaustion can occur because of a lack of a check in primitive value deserializers to avoid deep wrapper array nesting,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Those using Woodstox to parse XML data may be vulnerable to Denial of Service attacks (DOS) if DTD support is enabled. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A flaw was found in jackson-databind before 2.9.10.7. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.docx4j.org.apache.xalan.lib.sql.JNDIConnectionPool. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to com.oracle.wls.shaded.org.apache.xalan.lib.sql.JNDIConnectionPool (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Epss exploitation probability 41.1%.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.dbcp2.datasources.SharedPoolDataSource. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
FasterXML jackson-databind 2.x before 2.9.10.8 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.dbcp2.datasources.PerUserPoolDataSource. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.
A flaw was found in FasterXML Jackson Databind, where it did not have entity expansion secured properly. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.
FasterXML jackson-databind 2.x before 2.9.10.6 mishandles the interaction between serialization gadgets and typing, related to com.pastdev.httpcomponents.configuration.JndiConfiguration. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.6 mishandles the interaction between serialization gadgets and typing, related to br.com.anteros.dbcp.AnterosDBCPDataSource (aka Anteros-DBCP). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to org.jsecurity.realm.jndi.JndiRealmFactory (aka org.jsecurity). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to oadd.org.apache.xalan.lib.sql.JNDIConnectionPool (aka apache/drill). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to com.sun.org.apache.xalan.internal.lib.sql.JNDIConnectionPool (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.5 mishandles the interaction between serialization gadgets and typing, related to oracle.jms.AQjmsQueueConnectionFactory,. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.jelly.impl.Embedded (aka commons-jelly). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.springframework.aop.config.MethodLocatingFactoryBean (aka. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.openjpa.ee.WASRegistryManagedRuntime (aka openjpa). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 60.7%.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.commons.proxy.provider.remoting.RmiProvider (aka. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.activemq.* (aka activemq-jms, activemq-core, activemq-pool,. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to javax.swing.JEditorPane. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.aoju.bus.proxy.provider.remoting.RmiProvider (aka bus-proxy). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.caucho.config.types.ResourceRef (aka caucho-quercus). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.aries.transaction.jms.internal.XaPooledConnectionFactory (aka. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to br.com.anteros.dbcp.AnterosDBCPConfig (aka anteros-core). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig (aka. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to org.apache.hadoop.shaded.com.zaxxer.hikari.HikariConfig (aka shaded. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
FasterXML jackson-databind 2.0.0 through 2.9.10.2 lacks certain xbean-reflect/JNDI blocking, as demonstrated by org.apache.xbean.propertyeditor.JndiConverter. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A flaw was found in org.codehaus.jackson:jackson-mapper-asl:1.9.x libraries. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
SubTypeValidator.java in FasterXML jackson-databind before 2.9.9.2 mishandles default typing when ehcache is used (because of net.sf.ehcache.transaction.manager.DefaultTransactionManagerLookup),. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) vulnerability could allow attackers to modify object prototypes to inject properties affecting application logic.
FasterXML jackson-databind 2.x before 2.9.9.1 might allow attackers to have a variety of impacts by leveraging failure to block the logback-core class from polymorphic deserialization. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x through 2.9.9. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.x before 2.9.9. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Fasterxml Jackson version Before 2.9.8 contains a CWE-20: Improper Input Validation vulnerability in Jackson-Modules-Java8 that can result in Causes a denial-of-service (DoS). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
FasterXML jackson-databind before 2.7.9.3, 2.8.x before 2.8.11.1 and 2.9.x before 2.9.5 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 deserialization. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
FasterXML jackson-databind through 2.8.11 and 2.9.x through 2.9.3 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 and CVE-2017-17485 deserialization. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
XmlMapper in the Jackson XML dataformat component (aka jackson-dataformat-xml) before 2.7.8 and 2.8.x before 2.8.4 allows remote attackers to conduct server-side request forgery (SSRF) attacks via. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This XML External Entity (XXE) vulnerability could allow attackers to read arbitrary files or perform SSRF through XML processing.
XML external entity (XXE) vulnerability in XmlMapper in the Data format extension for Jackson (aka jackson-dataformat-xml) allows attackers to have unspecified impact via unknown vectors. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.