High severity7.5NVD Advisory· Published Jul 21, 2026· Updated Jul 27, 2026
CVE-2026-47247
CVE-2026-47247
Description
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.
Affected products
3- Range: <1.22.0
- osv-coords2 versionspkg:rpm/opensuse/libheif&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/libheif&distro=openSUSE%20Tumbleweed
< 1.23.0-160000.1.1+ 1 more
- (no CPE)range: < 1.23.0-160000.1.1
- (no CPE)range: < 1.22.2-1.1
Patches
Vulnerability mechanics
References
1- github.com/strukturag/libheif/security/advisories/GHSA-2vh6-whr3-cmq3nvdExploitVendor AdvisoryMitigation
News mentions
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