VDB
CVE-2026-47709
CVE-2026-47709
PUBLISHED
CVSS 6.9 MEDIUM
Reported by GitHub_M · Published July 21, 2026
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.
Risk Scores
CVSS 4.0
6.9
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| strukturag | libheif | < 1.22.0 |
| strukturag | libheif | < 1.22.0, < 1.22.0 |
Timeline
- May 28, 2026 CVE Published
- Jul 22, 2026 Coalition ESS Score
- Jul 27, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 5, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
- Sep 20, 2026 Security Advisory
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376 x_refsource_CONFIRM
- https://github.com/strukturag/libheif/issues/1802 x_refsource_MISC
- https://github.com/strukturag/libheif/pull/1806 x_refsource_MISC