What is CVE-2026-3949?

CVE-2026-3949 is a low-severity vulnerability in Strukturag Libheif, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-03-11.

How severe is CVE-2026-3949?

Low severity. CVSS v3 base score is 3.3 out of 10.

Buffer overflow in Strukturag Libheif

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…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (2.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Strukturag Libheif — versions 1.21.0, 1.21.1, 1.21.2

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (issue-tracking)
cna@vuldb.com (issue-tracking)
cna@vuldb.com (exploit)
cna@vuldb.com (patch)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-3949?: CVE-2026-3949 is a low-severity vulnerability in Strukturag Libheif, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2026-03-11.
How severe is CVE-2026-3949?: Low severity. CVSS v3 base score is 3.3 out of 10.