CVE-2026-3979
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | forky | fixed | 0 |
| debian | sid | fixed | 0 |
References
- https://github.com/quickjs-ng/quickjs/
- https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd
- https://github.com/quickjs-ng/quickjs/issues/1368
- https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962
- https://github.com/quickjs-ng/quickjs/pull/1370
- https://vuldb.com/?ctiid.350414
- https://vuldb.com/?id.350414
- https://vuldb.com/?submit.769600
- https://security-tracker.debian.org/tracker/CVE-2026-3979
CWEs
CWE-119 CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.