Incomplete Blacklist Affecting jackson-core package, versions <0:2.21.4-1.module+el8.10.0+90972+fe199724


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.71% (50th percentile)

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  • Snyk IDSNYK-ORACLE8-JACKSONCORE-18503861
  • published1 Aug 2026
  • disclosed23 Jun 2026

Introduced: 23 Jun 2026

CVE-2026-54513  (opens in a new tab)
CWE-184  (opens in a new tab)

How to fix?

Upgrade Oracle:8 jackson-core to version 0:2.21.4-1.module+el8.10.0+90972+fe199724 or higher.
This issue was patched in ELSA-2026-43218.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jackson-core package and not the jackson-core package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1