Detections
Analytics
CVE-2026-54513
high
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.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54513.json
https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f
https://github.com/FasterXML/jackson-databind/pull/5984
https://github.com/FasterXML/jackson-databind/issues/5983
https://github.com/FasterXML/jackson-databind/issues/5981
https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e
https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5
https://bugzilla.redhat.com/show_bug.cgi?id=2492010
https://access.redhat.com/security/cve/CVE-2026-54513
https://access.redhat.com/errata/RHSA-2026:48151
https://access.redhat.com/errata/RHSA-2026:48095
https://access.redhat.com/errata/RHSA-2026:44271
https://access.redhat.com/errata/RHSA-2026:44066
https://access.redhat.com/errata/RHSA-2026:44065
https://access.redhat.com/errata/RHSA-2026:44064
https://access.redhat.com/errata/RHSA-2026:44063
https://access.redhat.com/errata/RHSA-2026:44062
https://access.redhat.com/errata/RHSA-2026:44061
https://access.redhat.com/errata/RHSA-2026:43400
https://access.redhat.com/errata/RHSA-2026:43218
https://access.redhat.com/errata/RHSA-2026:41951