CVE-2026-54513

CVE Details

Release Date:	2026-06-23
Impact:	Important	What is this?

Description

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.

See more information about CVE-2026-54513 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	8.1
Vector String:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Version:	3.1
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 9 (jackson-annotations)	ELSA-2026-40895	2026-07-20
Oracle Linux version 9 (jackson-core)	ELSA-2026-40895	2026-07-20
Oracle Linux version 9 (jackson-databind)	ELSA-2026-40895	2026-07-20
Oracle Linux version 9 (jackson-jaxrs-providers)	ELSA-2026-40895	2026-07-20
Oracle Linux version 9 (jackson-modules-base)	ELSA-2026-40895	2026-07-20