{"id":"CVE-2026-120438","title":"QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration","summary":"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 ow…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-190"],"vendor":"quickjs-ng","product":"QuickJS-NG","affected":["QuickJS-NG < 0.16.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-11-05T21:37:52.469353Z"},"published":"2026-11-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:38:15.836Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120438","references":[{"url":"https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9p","label":"GitHub Security Advisory (GHSA-jp52-chwg-2p9p)"},{"url":"https://github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068"},{"url":"https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0","label":"QuickJS-NG v0.16.0 Release Notes"},{"url":"https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L51509"},{"url":"https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-proxy-ownkeys-enumeration","label":"VulnCheck Advisory: QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration"}],"tags":["cve.org"],"epss":0.0014,"epssPercentile":0.03352,"ingestedAt":"2026-11-05T19:30:42.656Z","slug":"CVE-2026-120438","body":"## Overview\n\nQuickJS-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.\n\n## Affected\n\n- `QuickJS-NG < 0.16.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}