---
cve: "CVE-2026-89059"
severity: "HIGH"
cvss: 7.5
epss: "0.6%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-09-18 08:17:01"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T17:38:11+02:00"
---

# CVE-2026-89059

> 7.5 HIGH · 🧪 PoC

## Beschreibung

A flaw was found in RESTEasy's IIOImageProvider, which decodes attacker-supplied image request bodies without enforcing any limit on the declared image dimensions or pixel count. A remote, unauthenticated attacker can send a small crafted image declaring enormous dimensions to trigger a very large memory allocation, exhausting the JVM heap and resulting in a denial of service.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 7c7e6b37c8b2451a37aed9cdc6978b447456bacb (Commit)

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-89059>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2519756>
- <https://github.com/resteasy/resteasy/commit/7c7e6b37c8b2451a37aed9cdc6978b447456bacb>
- <https://github.com/resteasy/resteasy/security/advisories/GHSA-m4pc-7gc7-9vw2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-89059) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_