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CVE-2026-3979

5.3 · MEDIUM

A flaw has been found in quickjs-ng quickjs up to 0.12.1.

Published Mar 12, 2026CWE-119EPSS 0.17%

Overview

CVE-2026-3979 is a medium-severity vulnerability. It was published on March 12, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A flaw has been found in quickjs-ng quickjs up to 0.12.1. This affects the function js_iterator_concat_return of the file quickjs.c. This manipulation causes use after free. The attack requires local access. The exploit has been published and may be used. Patch name: daab4ad4bae4ef071ed0294618d6244e92def4cd. Applying a patch is the recommended action to fix 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/quickjs-ng/quickjs/GitHubgithub.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cdGitHubgithub.com/quickjs-ng/quickjs/issues/1368GitHubgithub.com/quickjs-ng/quickjs/issues/1368#issue-4004680962GitHubgithub.com/quickjs-ng/quickjs/pull/1370Refvuldb.com/?ctiid.350414Refvuldb.com/?id.350414Refvuldb.com/?submit.769600

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3979?

CVE-2026-3979 is a medium-severity vulnerability. It was published on March 12, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-3979?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-3979?

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-2026-3979?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3979 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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