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.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
quickjs-ng QuickJS-NG unaffected
Version Status Constraints
0 affected < 0.16.0

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Project Subscriptions

Vendors Products
Quickjs Project Subscribe
Quickjs Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Mon, 02 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
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.
Title QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration
First Time appeared Quickjs Project
Quickjs Project quickjs
Weaknesses CWE-190
CPEs cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*
Vendors & Products Quickjs Project
Quickjs Project quickjs
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-02T14:29:00.633Z

Reserved: 2026-11-02T12:42:15.054Z

Link: CVE-2026-120438

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses