CVE-2026-120438
QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| QuickJS-NG quickjs-ng quickjs-ng/quickjs
github |
≥ 0; < 0.16.0 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.5 high |
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 | CNA: VulnCheck |
| 3.1 / 7.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9pCNA: VulnCheck · vendor-advisory
- https://github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068CNA: VulnCheck · patch
- https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0CNA: VulnCheck · release-notes
- https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L51509CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-proxy-ownkeys-enumerationCNA: VulnCheck · third-party-advisory
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