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CVE-2026-3979

MEDIUM CVSS 4.0: 4.8 EPSS 0.02%
Updated Mar 12, 2026
quickjs-ng
Parameter Value
CVSS 4.8 (MEDIUM)
Type CWE-416 (Use After Free), CWE-119 (Buffer Overflow)
Vendor quickjs-ng
Public PoC No

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.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v4.0