High 8.1Published Jun 23, 2026

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

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects FasterXML jackson-databind and 34 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for FasterXML jackson-databind

Exploited in the last 30 days

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 (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-184
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FasterXML jackson-databind fasterxml:jackson_databind (from the name)	from 2.10.0, < 2.18.8; from 2.19.0, < 2.21.4; from 3.0.0, < 3.1.4	CNA record
Red Hat Cryostat 4 on RHEL 9 redhat:cryostat	from 4.2.0-13 not affected	CISA ADP
Red Hat Red Hat AMQ Broker 7.13.6 redhat:amq_broker	7.13	CISA ADP
Red Hat Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16 redhat:apache_camel_spring_boot	4.18	CISA ADP
Red Hat Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 redhat:apache_camel_quarkus	3.33	CISA ADP
Red Hat Red Hat build of Keycloak 26.4 redhat:build_keycloak	from 26.4.14-1 not affected	CISA ADP
Red Hat Red Hat Certificate System 10.8 for RHEL-8 redhat:certificate_system	from 8100020260728001635.f9354743 not affected	CISA ADP
Red Hat Red Hat Data Grid 8.6.2 redhat:jboss_data_grid	8	CISA ADP
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:11.9.0-4.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:11.6.0-2.el10_0 not affected	CISA ADP
1–10 of 35

References

References

https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f	x-refsource-confirm, patch, vendor-advisory
https://github.com/FasterXML/jackson-databind/issues/5981	x-refsource-misc, issue-tracking
https://github.com/FasterXML/jackson-databind/issues/5983	x-refsource-misc, issue-tracking, patch
https://github.com/FasterXML/jackson-databind/pull/5984	x-refsource-misc, issue-tracking, patch
https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5	x-refsource-misc, patch
https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e	x-refsource-misc, patch
https://access.redhat.com/errata/RHSA-2026:36839
https://access.redhat.com/errata/RHSA-2026:40895
https://access.redhat.com/errata/RHSA-2026:41951
https://access.redhat.com/errata/RHSA-2026:43218
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.