CVE-2026-3979

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.

SeverityMedium

CVSS5.3

Exploit probability—

ProductQuickjs

PublishedMar 12, 2026

First seenMar 12, 2026

Weakness typeCWE-416Use after free CWE-119Memory buffer bounds error

How to fix

Patches

github.com/quickjs-ng/quickjs/pull/1370
github.com/quickjs-ng/quickjs/commit/daab4ad4bae4ef071ed0294618d6244e92def4cd

Affected products

Product	Affected versions	Fixed in
quickjs-ng quickjs	0.12.0, 0.12.1	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.