EUVD-2026-66838
GHSA-hwxv-6jph-89hg
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Description explicitly states unauthenticated attacker (PR:N); RCE via gadget chain implies full C/I/A impact, not the vendor's conservative I:L/A:L.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
Lifecycle Timeline
2DescriptionCVE.org
SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read directly via readObject(). If an application using this converter on an inbound HTTP endpoint has any known Java deserialization "gadget" on its classpath, a remote, unauthenticated attacker can achieve arbitrary code execution. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier
AnalysisAI
Unsafe Java deserialization in Spring Integration's SerializingHttpMessageConverter exposes applications to remote code execution via crafted HTTP requests bearing Content-Type: application/x-java-serialized-object. The converter passes the request body directly to a raw java.io.ObjectInputStream.readObject() call with no ObjectInputFilter or class allowlist, meaning any Serializable object - including known gadget-chain payloads - is fully deserialized. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two non-default conditions to be met simultaneously: first, the application must explicitly configure SerializingHttpMessageConverter on an inbound Spring Integration HTTP endpoint - this is not enabled by default and represents a deliberate developer choice; second, at least one known Java deserialization gadget library (such as Apache Commons Collections, Spring-ORM, Groovy, or Hibernate) must be present on the application classpath and reachable by the deserializer. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS score of 6.4 (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L) carries a significant internal contradiction: the vector specifies PR:L (a low-privileged, authenticated attacker) while the CVE description explicitly states 'remote, unauthenticated attacker' - these signals are mutually exclusive and the discrepancy must be verified with the Spring/VMware security team before using either score for prioritization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Spring Integration to a patched release per the Spring security advisory at https://spring.io/security/cve-2026-47864; exact fixed version numbers are not confirmed from the provided data and must be taken directly from that advisory for each affected branch (5.5.x, 6.4.x, 6.5.x, 7.0.x, 7.1.x). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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