CVE-2026-54513 jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)

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 th...

PT-2026-51602

Name of the Vulnerable Software and Affected Versions jackson-databind versions 2.21.0 through 2.21.3 jackson-databind versions 3.0.0 through 3.1.3 Description The UnwrappedPropertyHandler.processUnwrappedCreatorProperties function replays buffered JSON into creator parameters without consulting...