{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120438", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-02T12:42:15.054Z", "datePublished": "2026-11-02T14:29:00.633Z", "dateUpdated": "2026-11-02T14:29:00.633Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-02T14:29:00.633Z"}, "datePublic": "2026-07-31T00:00:00.000Z", "title": "QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Integer Overflow or Wraparound", "cweId": "CWE-190", "type": "CWE"}]}], "affected": [{"vendor": "quickjs-ng", "product": "QuickJS-NG", "packageURL": "pkg:github/quickjs-ng/quickjs", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.16.0", "status": "affected", "versionType": "semver"}], "repo": "https://github.com/quickjs-ng/quickjs"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.16.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-jp52-chwg-2p9p", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-jp52-chwg-2p9p)"}, {"url": "https://github.com/quickjs-ng/quickjs/commit/252209d99cf112568160548bdcaa98d95e0d0068", "tags": ["patch"]}, {"url": "https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0", "tags": ["release-notes"], "name": "QuickJS-NG v0.16.0 Release Notes"}, {"url": "https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L51509", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: QuickJS-NG before 0.16.0 Heap Buffer Overflow via Proxy ownKeys Enumeration", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-heap-buffer-overflow-via-proxy-ownkeys-enumeration"}], "credits": [{"lang": "en", "value": "Tristan Madani (Talence Security)", "type": "finder"}, {"lang": "en", "value": "Sa\u00fal Ibarra Corretg\u00e9", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}