CVE-2026-3950A vulnerability was identified in strukturag libheif up to 1.21.2.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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.
- CVSS
- 3.3 LOW (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-119, CWE-125
- 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
- Deferred
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
No affected products are listed yet.
References
- https://github.com/Niebelungen-D/pocs/tree/main/heif_dec_sequence_chunk_idx_oob
- https://github.com/strukturag/libheif/
- https://github.com/strukturag/libheif/issues/1715
- https://github.com/strukturag/libheif/pull/1721
- https://vuldb.com/?ctiid.350382
- https://vuldb.com/?id.350382
- https://vuldb.com/?submit.766431
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.