CVE-2026-120438

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L51509
https://github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068
https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0
https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9p
https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-proxy-ownkeys-enumeration

Configurations

No configuration.

History

02 Nov 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-11-02 15:17

Updated : 2026-11-02 19:34

NVD link : CVE-2026-120438

Mitre link : CVE-2026-120438

CVE.ORG link : CVE-2026-120438

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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