{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-118660", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-28T17:25:37.561Z", "datePublished": "2026-10-28T20:23:10.122Z", "dateUpdated": "2026-10-28T20:23:10.122Z"}, "containers": {"cna": {"title": "Happy DOM: SSRF via iframe and link stylesheet when parsing untrusted HTML", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8"}, {"name": "https://github.com/capricorn86/happy-dom/pull/2502", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/pull/2502"}, {"name": "https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74"}, {"name": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0"}], "affected": [{"vendor": "capricorn86", "product": "happy-dom", "versions": [{"version": "< 21.0.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T20:23:10.122Z"}, "descriptions": [{"lang": "en", "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel=\"stylesheet\" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0."}], "source": {"advisory": "GHSA-c8p4-j97h-3vg8", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "happy-dom", "vendor": "capricorn86", "versions": [{"status": "affected", "version": "< 21.0.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel=\"stylesheet\" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0."}], "id": "CVE-2026-118660", "lastModified": "2026-10-28T21:16:56.123", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-28T21:16:56.123", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/pull/2502"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,21.0.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "happy-dom", "source": "cna", "vendor": "capricorn86"}, "product": "happy-dom", "vendor": "capricorn86"}], "created": "2026-10-28T21:44:28.931944+00:00", "updated": "2026-10-28T22:00:18.013928+00:00", "vendors": ["capricorn86", "capricorn86$PRODUCT$happy-dom"]}