CVE Watch21 jul 2026

CVE-2026-47247

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory a

CVSS

7.5

Alto

EPSS

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KEV

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Exploit Today

0-100

Publicado: 21 jul 2026 · Última mod.: 21 jul 2026 · CWE-200 · CWE-226 · CWE-682

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak process heap memory as visible pixel values in decoded grid images. An attacker who uploads a crafted AVIF/HEIC file to any server-side image processor (WordPress, Sharp/libvips, ImageMagick, etc.) can recover heap data - including library function pointers sufficient to defeat ASLR, or any other secret - from the publicly-downloadable transcoded JPEG/PNG/WebP output. Local attack vectors are also possible. Version 1.22.0 fixes the issue.

Referencias oficiales

github.comhttps://github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3

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