Low severity · published Mar 11, 2026
CVE-2026-3949
strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds
3.3
CVSS
0.1%
EPSS
No
On KEV
Description
A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libheif · strukturag
1.21.0; 1.21.1; 1.21.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3949
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3949
github.com
https://github.com/biniamf/pocs/tree/main/libheif_vvdec
github.com
https://github.com/strukturag/libheif/
github.com
https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03
github.com
https://github.com/strukturag/libheif/issues/1712
github.com
https://github.com/strukturag/libheif/issues/1712#issuecomment-3947938531
vuldb.com
https://vuldb.com/?ctiid.350381
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