GHSA-RMJ7-2VXQ-3G9F jackson-databind has an array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)

Summary 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...

CVE-2026-54513

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...