---
cve: "CVE-2026-47709"
severity: "MEDIUM"
cvss: 6.9
epss: "21%"
vendor: "strukturag"
kev: false
exploited: false
published: "2026-07-21 22:17:13"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T19:10:14+02:00"
---

# CVE-2026-47709

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 0c81a846b7401dbdb7118afd0761057f21e43511 (Commit)

## Referenzen

- <https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376>
- <https://github.com/strukturag/libheif/issues/1802>
- <https://github.com/strukturag/libheif/pull/1806>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-47709) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_