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

> CVE-2026-54513: jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray). CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-54513
Last updated: 2026-09-14T13:18:40Z

- Published: 2026-06-23 20:53 UTC · Updated: 2026-09-14 13:18 UTC · Assigner: GitHub\_M
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 1.2%, 69th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-184

## 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.

## Affected vendors and products

- FasterXML: jackson-databind
- Red Hat: OpenShift Developer Tools and Services
- Red Hat: Red Hat AI Inference Server
- Red Hat: Red Hat AMQ Broker 7.13.6
- Red Hat: Red Hat AMQ Broker 7.14.1
- Red Hat: Red Hat AMQ Clients
- Red Hat: Red Hat Ansible Automation Platform 2
- Red Hat: Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16
- Red Hat: Red Hat Build of Apache Camel 4.18 for Quarkus 3.33
- Red Hat: Red Hat build of Apache Camel 4 for Quarkus 3
- Red Hat: Red Hat build of Apache Camel - HawtIO 4
- Red Hat: Red Hat build of Apicurio Registry 3
- Red Hat: Red Hat build of Debezium 3
- Red Hat: Red Hat build of Keycloak 26.4.14
- Red Hat: Red Hat build of Keycloak 26.6.5
- Red Hat: Red Hat Certificate System 10.8 for RHEL-8
- Red Hat: Red Hat Data Grid 8.6.2
- Red Hat: Red Hat Enterprise Linux 8
- Red Hat: Red Hat Enterprise Linux 9
- Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3
- Red Hat: Red Hat JBoss Enterprise Application Platform 7
- Red Hat: Red Hat JBoss Enterprise Application Platform 8
- Red Hat: Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat: Red Hat Lightspeed for Runtimes Operator
- Red Hat: Red Hat Offline Knowledge Portal
- Red Hat: Red Hat OpenShift AI (RHOAI)
- Red Hat: streams for Apache Kafka 2
- Red Hat: Streams for Apache Kafka 3.2.1

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-54513)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-54513)
- [https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5](https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5)
- [https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e](https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e)
- [https://github.com/FasterXML/jackson-databind/issues/5981](https://github.com/FasterXML/jackson-databind/issues/5981)
- [https://github.com/FasterXML/jackson-databind/issues/5983](https://github.com/FasterXML/jackson-databind/issues/5983)
- [https://github.com/FasterXML/jackson-databind/pull/5984](https://github.com/FasterXML/jackson-databind/pull/5984)
- [https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f](https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-54513 · Markdown: https://rewindex.com/cve/CVE-2026-54513.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-54513 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:03:58.434Z