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CVE-2026-120439 Details

Description

QuickJS-NG before 0.16.0 contains an integer overflow in js_typed_array_sort() in quickjs.c that allows attackers to cause a heap buffer overflow on 32-bit hosts. Attackers who can run JavaScript can call TypedArray.prototype.sort with a comparator on a typed array near 2^30 elements, wrapping the allocation size and writing indices past the buffer to crash or potentially execute code.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6	CISA-ADP
https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L60032	[email protected]
https://github.com/quickjs-ng/quickjs/commit/e93cca611908e12b824ec85fbee6b31a5ee61568	[email protected]
https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0	[email protected]
https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-9wv5-5cgr-grj6	[email protected]
https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-typedarray-prototype-sort	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 6, 2026	CVE Modified	CISA-ADP
Nov 2, 2026	New CVE Received	[email protected]