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CVE-2026-3949

3.3 · LOW

A vulnerability was determined in strukturag libheif up to 1.21.2.

Published Mar 11, 2026CWE-119EPSS 0.17%

Overview

CVE-2026-3949 is a low-severity vulnerability. It was published on March 11, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/biniamf/pocs/tree/main/libheif_vvdecGitHubgithub.com/strukturag/libheif/GitHubgithub.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03GitHubgithub.com/strukturag/libheif/issues/1712GitHubgithub.com/strukturag/libheif/issues/1712#issuecomment-3947938531Refvuldb.com/?ctiid.350381Refvuldb.com/?id.350381Refvuldb.com/?submit.765979

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3949?

CVE-2026-3949 is a low-severity vulnerability. It was published on March 11, 2026 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2026-3949?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-3949?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-3949?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3949 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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