CVE-2026-3979

MEDIUM

quickjs-ng quickjs <=0.12.1 - Use After Free

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Permissions Required, VDB Entry vdb-entry technical-description
https://vuldb.com/?id.350414
Permissions Required, VDB Entry signature permissions-required
https://vuldb.com/?ctiid.350414
Permissions Required, VDB Entry third-party-advisory
https://vuldb.com/?submit.769600
Issue Tracking issue-tracking patch
https://github.com/quickjs-ng/quickjs/pull/1370
Various Sources product
https://github.com/quickjs-ng/quickjs/

Scores

CVSS v3 5.3
EPSS 0.0011
EPSS Percentile 1.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-119 CWE-416
Status published
Products (2)
quickjs-ng/quickjs 0.12.0
quickjs-ng/quickjs 0.12.1
Published Mar 12, 2026
Tracked Since Mar 12, 2026