CVE-2026-3979 Details
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.
A use-after-free vulnerability has been identified in quickjs-ng QuickJS versions through 0.12.1. The issue arises in the js_iterator_concat_return function within quickjs.c, where the iterator handling can be manipulated to create a re-entrancy problem. This vulnerability requires local access to exploit.
Users are advised to update to the patched version of quickjs-ng QuickJS, which is available on the project's GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Mar 12, 2026CISA-ADP
Assessed Mar 12, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/quickjs-ng/quickjs/ | [email protected] | Vendor |
| https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd | [email protected] | Source CodeVendor |
| https://github.com/quickjs-ng/quickjs/issues/1368 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/quickjs-ng/quickjs/pull/1370 | [email protected] | Issue TrackingSource CodeVendor |
| https://vuldb.com/?ctiid.350414 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/?id.350414 | [email protected] | AdvisoryExploitRemedy |
| https://vuldb.com/?submit.769600 | [email protected] | ExploitTechnical Description |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| quickjs-ng quickjs | <= 0.12.1 (semver) |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 12, 2026 | New CVE Received | [email protected] |