CVE-2026-3949

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.

• CWE-119
• CWE-125

• https://github.com/biniamf/pocs/tree/main/libheif_vvdec
• https://github.com/strukturag/libheif/
• https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03
• https://github.com/strukturag/libheif/issues/1712
• https://github.com/strukturag/libheif/issues/1712#issuecomment-3947938531
• https://vuldb.com/?ctiid.350381
• https://vuldb.com/?id.350381
• https://vuldb.com/?submit.765979

Published

Mar 11, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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