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CVE

CWE

Training

CVE-2026-3979

Published: Mar 12, 2026

Modified: Mar 12, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

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.

Vendor	Product	Versions
quickjs-ng	quickjs	affected `0.12.0` affected `0.12.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

References

VDB-350414 | quickjs-ng quickjs quickjs.c js_iterator_concat_return use after free

vdb-entry

technical-description

VDB-350414 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #769600 | quickjs-ng QuickJS 0.12.1 Use-After-Free

third-party-advisory

https://github.com/quickjs-ng/quickjs/issues/1368

issue-tracking

https://github.com/quickjs-ng/quickjs/pull/1370

issue-tracking

patch

https://github.com/quickjs-ng/quickjs/issues/1368#issue-4004680962

exploit

issue-tracking

https://github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd

patch

https://github.com/quickjs-ng/quickjs/

product

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