---
cve: "CVE-2026-55380"
severity: "HIGH"
cvss: 7.5
epss: "0.4%"
vendor: "python-pillow"
kev: false
exploited: false
published: "2026-07-06 19:17:08"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T08:49:41+02:00"
---

# CVE-2026-55380

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.

## 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)

- bb1d8e8ab8d29048624d96e3ee53cecf7c13d13d (Commit)
- f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675 (Commit)

## Referenzen

- <https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm>
- <https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675>
- <https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55380) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_