Vulnerability Description
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fasterxml | Jackson-Databind | >= 2.10.0, < 2.18.8 |
Related Weaknesses (CWE)
References
- https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8aPatch
- https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebPatch
- https://github.com/FasterXML/jackson-databind/issues/5981Issue Tracking
- https://github.com/FasterXML/jackson-databind/issues/5983Issue TrackingPatch
- https://github.com/FasterXML/jackson-databind/pull/5984Issue TrackingPatch
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxqPatchVendor Advisory
- https://access.redhat.com/errata/RHSA-2026:36839
- https://access.redhat.com/errata/RHSA-2026:40895
- https://access.redhat.com/errata/RHSA-2026:41951
- https://access.redhat.com/errata/RHSA-2026:43218
- https://access.redhat.com/errata/RHSA-2026:43400
- https://access.redhat.com/errata/RHSA-2026:44061
- https://access.redhat.com/errata/RHSA-2026:44062
- https://access.redhat.com/errata/RHSA-2026:44063
- https://access.redhat.com/errata/RHSA-2026:44064
FAQ
What is CVE-2026-54513?
CVE-2026-54513 is a vulnerability with a CVSS score of 8.1 (HIGH). jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.a...
How severe is CVE-2026-54513?
CVE-2026-54513 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54513?
Check the references section above for vendor advisories and patch information. Affected products include: Fasterxml Jackson-Databind.