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CVE-2026-54513

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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 8.1 · High · EPSS 1.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • jackson-databind

    Versions
    • >= 2.10.0, < 2.18.8: Affected
    • >= 2.19.0, < 2.21.4: Affected
    • >= 3.0.0, < 3.1.4: Affected

    No fix published

  • jackson-databind Debian:12

    Versions
    • 2.14.0+ds-1
    • 2.14.0+ds-2
    • 2.14.0+ds-3
    • 2.14.0-1
    • 2.14.0-1+deb12u1
    • 2.18.11-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Debian:13

    Versions
    • 2.14.0+ds-1
    • 2.14.0+ds-1+deb13u1
    • 2.14.0+ds-2
    • 2.14.0+ds-3
    • 2.18.11-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Debian:14

    Versions
    • 2.14.0+ds-1
    • 2.14.0+ds-2
    • 2.14.0+ds-3
    Affected ranges
    • ECOSYSTEM: < 2.18.11-1

    Update to 2.18.11-1

  • jackson-databind Ubuntu:Pro:14.04:LTS

    Versions
    • 2.2.2-1
    • 2.2.2-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:Pro:16.04:LTS

    Versions
    • 2.4.2-2
    • 2.4.2-3
    • 2.4.2-3ubuntu0.1~esm1
    • 2.4.2-3ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:18.04:LTS

    Versions
    • 2.8.6-1
    • 2.9.1-1
    • 2.9.4-1
    • 2.9.5-1
    • 2.9.8-1~18.04
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:20.04:LTS

    Versions
    • 2.9.9.3-1
    • 2.10.0-2
    • 2.10.1-1
    • 2.10.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:22.04:LTS

    Versions
    • 2.12.1-1
    • 2.12.5-1
    • 2.13.0-1
    • 2.13.0-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:24.04:LTS

    Versions
    • 2.14.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:25.10

    Versions
    • 2.14.0+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:26.10

    Versions
    • 2.14.0+ds-1build1
    • 2.14.0+ds-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • jackson-databind Ubuntu:26.04:LTS

    Versions
    • 2.14.0+ds-1
    • 2.14.0+ds-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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