---
cve: "CVE-2026-55798"
severity: "MEDIUM"
cvss: 4.5
epss: "18%"
vendor: "python-pillow"
kev: false
exploited: false
published: "2026-07-06 19:17:08"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T10:45:22+02:00"
---

# CVE-2026-55798

> 4.5 MEDIUM · 🧪 PoC

## Beschreibung

Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- bb1d8e8ab8d29048624d96e3ee53cecf7c13d13d (Commit)
- 8404ea5fe5df40fc34aa1e51403dd6fce0778b8a (Commit)

## Referenzen

- <https://github.com/python-pillow/Pillow/security/advisories/GHSA-4x4j-2g7c-83w6>
- <https://github.com/python-pillow/Pillow/commit/8404ea5fe5df40fc34aa1e51403dd6fce0778b8a>
- <https://github.com/python-pillow/Pillow/commit/88194166691b7b603529b8b036ab3ab9cedd2de4>
- <https://github.com/python-pillow/Pillow/commit/b0e06caa64c1405aa3da0bb1d2bd9a77ca22de7f>
- <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-2026-55798) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_