---
cve: "CVE-2026-49271"
severity: "MEDIUM"
cvss: 6.5
epss: "20%"
vendor: "strukturag"
kev: false
exploited: false
published: "2026-06-19 18:16:19"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T04:04:51+02:00"
---

# CVE-2026-49271

> 6.5 MEDIUM · 🧪 PoC

## Beschreibung

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 8027b0a04066b13d07f0e3b9dc8ed9f40530c51d (Commit)

## Referenzen

- <https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49271) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_