CVE-2026-120438
QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-190 |
| Vendor | quickjs-ng |
| Product | quickjs-ng |
| Published | Nov 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
quickjs-ng / QuickJS-NG
0 < 0.16.0
References
github.com: https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9p github.com: https://github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068 github.com: https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0 github.com: https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L51509 vulncheck.com: https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-proxy-ownkeys-enumeration
Credits
Tristan Madani (Talence Security) Saúl Ibarra Corretgé