CVE-2026-120438

High

Description

QuickJS-NG before 0.16.0 contains an integer overflow in js_proxy_get_own_property_names() in quickjs.c that causes a heap buffer overflow on 32-bit hosts. Attackers running JavaScript can return a large array-like object from a Proxy ownKeys trap to wrap the allocation size, causing crashes or potential code execution.

SeverityHigh

CVSS7.8

Exploit probability—

ProductQuickJS-NG

PublishedNov 2, 2026

First seenNov 4, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

quickjs-ng QuickJS-NG0.16.0 or later

Patches

github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068

Vendor advisories

github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9p
github.com/quickjs-ng/quickjs/releases/tag/v0.16.0

Affected products

Product	Affected versions	Fixed in
quickjs-ng QuickJS-NG	v < 0.16.0	0.16.0

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