---
cve: "CVE-2025-66293"
severity: "HIGH"
cvss: 7.1
epss: "0.4%"
vendor: "pnggroup"
kev: false
exploited: false
published: "2025-12-03 20:33:57"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:26:41+02:00"
---

# CVE-2025-66293

> 7.1 HIGH · 🧪 PoC

## Beschreibung

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- fbed16182b92eeb3a06d96e49f0836d450318098 (Commit)
- 788a624d7387a758ffd5c7ab010f1870dea753a1 (Commit)

## Referenzen

- <https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f>
- <https://github.com/pnggroup/libpng/issues/764>
- <https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1>
- <https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-66293) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_