Update jackson-bom version to 2.21.4#108
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Patches CVE-2026-54513 (CVSS 8.1, High): allowIfSubTypeIsArray bypass in BasicPolymorphicTypeValidator. Affects jackson-databind >= 2.19.0, < 2.21.4. Fixed in 2.21.4. Advisory: GHSA-rmj7-2vxq-3g9f
aaron-steinfeld
approved these changes
Jun 24, 2026
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Summary
Bumps
jackson-bomfrom 2.21.1 → 2.21.4 ingradle/libs.versions.toml.This is a patch-level upgrade within the 2.21.x series that pulls in security fixes for
jackson-databind, with no API or behavioral changes.Why
BasicPolymorphicTypeValidator.allowIfSubTypeIsArray()permits array types without checking the component type, enabling instantiation of non-allowlisted classes via an array wrapper.jackson-databind>= 2.19.0, < 2.21.4. Fixed in 2.21.4.Both are weaknesses in
BasicPolymorphicTypeValidator(CWE-184 / CWE-502).Verification
jackson-bom-2.21.4.pomconfirmed pinningjackson-databind 2.21.4).2.21.xseries — no breaking changes expected.Test plan
jackson-databindat 2.21.4 transitively via this BOM