CVE-2026-3979CWE-119CWE-416

quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free

Medium · published March 12, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
5.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00165 · 5.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-416 · Use After Free
Published
2026-03-12T03:32Z
EPSS history
Timeline
  • 12 MAR 03:32Z
    quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free
    cvelistv5