CVE-2026-54513
jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)
At a glance
- Severity
- HIGH 8.1
- EPSS
- EPSS 1.23 % · percentile 69 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
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.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | GitHub_M |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-rmj7-2vxq-3g9f — jackson-databind has an array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)
European references
- ENISA EUVD · EUVD-2026-38593
- GCVE · GCVE-0-2026-54513
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1291 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1256 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0986 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0933 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0914 — Multiples vulnérabilités dans Oracle Database Server · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*≥ 2.10.0 < 2.18.8cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*≥ 2.19.0 < 2.21.4cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*≥ 3.0.0 < 3.1.4
Affected products
| Product | Versions |
|---|---|
| FasterXML · jackson-databind | affected >= 2.10.0, < 2.18.8 ; affected >= 2.19.0, < 2.21.4 ; affected >= 3.0.0, < 3.1.4 |
References
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-rmj7-2vxq-3g9f
- https://github.com/FasterXML/jackson-databind/issues/5981
- https://github.com/FasterXML/jackson-databind/issues/5983
- https://github.com/FasterXML/jackson-databind/pull/5984
- https://github.com/FasterXML/jackson-databind/commit/01d1692c8d0ed03e51a0e3c4f8a9e6908e4931e5
- https://github.com/FasterXML/jackson-databind/commit/24529da29fdf46ff94ca38de9ebf31cd188f5e8e
- https://access.redhat.com/security/cve/CVE-2026-54513
- https://bugzilla.redhat.com/show_bug.cgi?id=2492010
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54513.json
- https://access.redhat.com/errata/RHSA-2026:48095
- https://access.redhat.com/errata/RHSA-2026:48151
- https://access.redhat.com/errata/RHSA-2026:50847
- https://access.redhat.com/errata/RHSA-2026:50849
- https://access.redhat.com/errata/RHSA-2026:44271
- https://access.redhat.com/errata/RHSA-2026:43400
- https://access.redhat.com/errata/RHSA-2026:43218
- https://access.redhat.com/errata/RHSA-2026:44062
- https://access.redhat.com/errata/RHSA-2026:44061
- https://access.redhat.com/errata/RHSA-2026:44066
- https://access.redhat.com/errata/RHSA-2026:44063
- https://access.redhat.com/errata/RHSA-2026:44065
- https://access.redhat.com/errata/RHSA-2026:44064
- https://access.redhat.com/errata/RHSA-2026:40895
- https://access.redhat.com/errata/RHSA-2026:66545
- https://access.redhat.com/errata/RHSA-2026:66488
- https://access.redhat.com/errata/RHSA-2026:36839
- https://access.redhat.com/errata/RHSA-2026:41951
- https://access.redhat.com/errata/RHSA-2026:62260
- https://access.redhat.com/errata/RHSA-2026:54622
- https://access.redhat.com/errata/RHSA-2026:50846
- https://access.redhat.com/errata/RHSA-2026:50848
- https://access.redhat.com/errata/RHSA-2026:54435
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |