EUVD-2026-43957Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Network vector and no privileges required because attacker only needs to submit JSON to an exposed endpoint; AC:L because no per-request complexity is needed once the target endpoint is identified, despite the code-level prerequisites on the server side.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.15.0 until 2.18.8, 2.21.4, and 3.1.4, Java Records using a PropertyNamingStrategy can bypass @JsonIgnore because POJOPropertiesCollector._removeUnwantedIgnorals() records an ignored component under its original implicit name before _renameUsing() applies the naming strategy, allowing the renamed JSON key to be assigned to the Record constructor parameter. This issue is fixed in versions 2.18.8, 2.21.4, and 3.1.4.
AnalysisAI
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. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Four conditions must all be true simultaneously for exploitation: (1) The application uses jackson-databind in the affected version range (2.15.0-2.18.7, or 2.19.x-2.21.3, or 3.0.x-3.1.3). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, score 6.5) assigns low complexity and no authentication, which is accurate from the attacker's perspective - crafting a JSON payload with a renamed field requires no special tooling or privilege. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker submits a POST request containing JSON payload '{"username":"alice","internal_role":"ADMIN"}' to a REST endpoint that deserializes the body into a Java Record annotated with @JsonNaming(SnakeCaseStrategy.class), where the 'internalRole' component is marked @JsonIgnore. The application's authorization logic subsequently reads 'internalRole' from the deserialized Record object and grants elevated privileges, believing the field cannot be externally supplied. … |
| Remediation | Upgrade jackson-databind to version 2.18.8, 2.21.4, or 3.1.4 as appropriate for the branch in use - these are the confirmed fix versions per the upstream GitHub advisory (https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-3pjw-73gf-8qr5) and the merged PR (https://github.com/FasterXML/jackson-databind/pull/5974). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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