CVE-2026-3950: Strukturag Libheif

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability was identified in strukturag libheif up to 1.21.2. This impacts the function Track::load of the file libheif/sequences/track.cc of the component stsz/stts. The manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. Applying a patch is the recommended action to fix this issue. The patch available is inofficial and not approved yet.

Affected products

• Strukturag Libheif: version 1.21.0 only; version 1.21.1 only; version 1.21.2 only

Published 2026-03-11. Last modified 2026-06-17.