# CVE-2026-54513

## Summary

- **CVE ID:** CVE-2026-54513
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-184
- **Published:** Jun 23, 2026
- **Last Modified:** Sep 14, 2026

## 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 Products

- FasterXML — jackson-databind (>= 2.10.0, < 2.18.8)
- FasterXML — jackson-databind (>= 2.19.0, < 2.21.4)
- FasterXML — jackson-databind (>= 3.0.0, < 3.1.4)

## References

- [CNA](https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f)
- [CNA](https://github.com/FasterXML/jackson-databind/issues/5981)
- [CNA](https://github.com/FasterXML/jackson-databind/issues/5983)
- [CNA](https://github.com/FasterXML/jackson-databind/pull/5984)
- [CNA](https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5)
- [CNA](https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-54513)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2492010)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54513.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:36839)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:40895)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:41951)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:43218)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44271)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:43400)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44062)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44061)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44066)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44063)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44065)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44064)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:48095)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:48151)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50847)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50849)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50846)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50848)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:54435)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:54622)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:62260)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:66545)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:66488)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.89%
- **EPSS Percentile:** 57.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._