{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120440", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-02T12:42:15.887Z", "datePublished": "2026-11-02T14:29:02.038Z", "dateUpdated": "2026-11-02T14:29:02.038Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-02T14:29:02.038Z"}, "datePublic": "2026-07-31T00:00:00.000Z", "title": "QuickJS-NG before 0.16.0 Memory Leak via Atomics.store", "descriptions": [{"lang": "en", "value": "QuickJS-NG before 0.16.0 contains a memory leak vulnerability in js_atomics_store() in quickjs.c that fails to free the converted value when returning a RangeError. Attackers running JavaScript can repeatedly call Atomics.store with a valueOf that detaches or shrinks the buffer to exhaust heap memory and cause denial of service."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing Release of Memory after Effective Lifetime", "cweId": "CWE-401", "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:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9w", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-wm7w-r6qf-3c9w)"}, {"url": "https://github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7e", "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#L61154", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: QuickJS-NG before 0.16.0 Memory Leak via Atomics.store", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-store"}], "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:github/quickjs-ng/quickjs", "product": "QuickJS-NG", "repo": "https://github.com/quickjs-ng/quickjs", "vendor": "quickjs-ng", "versions": [{"lessThan": "0.16.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "QuickJS-NG before 0.16.0 contains a memory leak vulnerability in js_atomics_store() in quickjs.c that fails to free the converted value when returning a RangeError. Attackers running JavaScript can repeatedly call Atomics.store with a valueOf that detaches or shrinks the buffer to exhaust heap memory and cause denial of service."}], "id": "CVE-2026-120440", "lastModified": "2026-11-02T15:17:26.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-11-02T15:17:26.103", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/quickjs-ng/quickjs/blob/v0.15.1/quickjs.c#L61154"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/quickjs-ng/quickjs/commit/62951e1bc68711d37aad986ff84ef0fe17038a7e"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/quickjs-ng/quickjs/releases/tag/v0.16.0"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/quickjs-ng/quickjs/security/advisories/GHSA-wm7w-r6qf-3c9w"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/quickjs-ng-before-0.16.0-memory-leak-via-atomics-store"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{}

{"created": "2026-11-02T15:30:14.816532+00:00", "updated": "2026-11-02T15:30:14.816538+00:00", "vendors": []}