---
cve: "CVE-2026-54513"
severity: "HIGH"
cvss: 8.1
epss: "71%"
vendor: "FasterXML"
kev: false
exploited: false
published: "2026-06-23 21:17:02"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T05:09:42+02:00"
---

# CVE-2026-54513

> 8.1 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 0b422144d1785200e44a0b00c973f6ac95adcf5a (Commit)
- dd72fa6c89b5cea6c4eba5a8604f248bbc5d93e5 (Commit)

## Referenzen

- <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/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>
- <https://access.redhat.com/errata/RHSA-2026:43400>
- <https://access.redhat.com/errata/RHSA-2026:44061>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54513) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_