Low 3.3Published Mar 11, 2026

CVE-2026-3950strukturag libheif stsz/stts track.cc load out-of-bounds

Updated under an hour ago (Oct 26, 2026, 1:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for strukturag libheif

Exploited in the last 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.

CVSS: 3.3 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-125, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Mar 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

strukturag libheif strukturag:libheif (from the name)	1.21.0; 1.21.1; 1.21.2	CNA record

References

References

https://vuldb.com/?id.350382	vdb-entry, technical-description
https://vuldb.com/?ctiid.350382	signature, permissions-required
https://vuldb.com/?submit.766431	third-party-advisory
https://github.com/strukturag/libheif/issues/1715	issue-tracking
https://github.com/Niebelungen-D/pocs/tree/main/heif_dec_sequence_chunk_idx_oob	exploit
https://github.com/strukturag/libheif/pull/1721	issue-tracking, patch
https://github.com/strukturag/libheif/	product

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.