CVE-2026-32740libheif is a HEIF and AVIF file format decoder and encoder.
Updated under an hour ago ()
Does this affect you?
It affects struktur libheif. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1×4 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0.
- CVSS
- 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
struktur libheif struktur:libheif | before 1.22.0 | NVD |
References
- https://github.com/strukturag/libheif/releases/tag/v1.22.0release-notes
- https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6jexploit, vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-32740
- https://bugzilla.redhat.com/show_bug.cgi?id=2479969
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32740.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.