{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-118661", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-28T17:25:37.561Z", "datePublished": "2026-10-28T20:30:23.868Z", "dateUpdated": "2026-10-28T20:30:23.868Z"}, "containers": {"cna": {"title": "Happy DOM: Cookie scope forgery: no DNS-label boundary on Domain= matching , attacker origin sets victim cookies", "problemTypes": [{"descriptions": [{"cweId": "CWE-565", "lang": "en", "description": "CWE-565: Reliance on Cookies without Validation and Integrity Checking", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-5fpq-26gf-qwcr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-5fpq-26gf-qwcr"}, {"name": "https://github.com/capricorn86/happy-dom/pull/2477", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/pull/2477"}, {"name": "https://github.com/capricorn86/happy-dom/commit/f21dbd7d0a0c63cdd41954ba5d0f05def4e0f2b3", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/commit/f21dbd7d0a0c63cdd41954ba5d0f05def4e0f2b3"}, {"name": "https://github.com/capricorn86/happy-dom/releases/tag/v20.14.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/releases/tag/v20.14.6"}], "affected": [{"vendor": "capricorn86", "product": "happy-dom", "versions": [{"version": "< 20.14.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T20:30:23.868Z"}, "descriptions": [{"lang": "en", "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 20.14.6, Happy DOM's CookieContainer in src/cookie/CookieContainer.ts does not correctly validate or match Domain cookie attributes. It can accept a Domain unrelated to the origin setting the cookie, including a public suffix, and separately treats an unrelated suffix-sharing hostname as a match because cookieMatchesURL does not enforce a DNS-label boundary. In server-side rendering and prerendering applications that contact attacker-controlled origins and then make requests to a victim origin, these behaviors can plant and deliver a forged cookie, enabling cookie injection or session fixation. This issue is fixed in version 20.14.6."}], "source": {"advisory": "GHSA-5fpq-26gf-qwcr", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "happy-dom", "vendor": "capricorn86", "versions": [{"status": "affected", "version": "< 20.14.6"}]}], "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 20.14.6, Happy DOM's CookieContainer in src/cookie/CookieContainer.ts does not correctly validate or match Domain cookie attributes. It can accept a Domain unrelated to the origin setting the cookie, including a public suffix, and separately treats an unrelated suffix-sharing hostname as a match because cookieMatchesURL does not enforce a DNS-label boundary. In server-side rendering and prerendering applications that contact attacker-controlled origins and then make requests to a victim origin, these behaviors can plant and deliver a forged cookie, enabling cookie injection or session fixation. This issue is fixed in version 20.14.6."}], "id": "CVE-2026-118661", "lastModified": "2026-10-28T21:16:56.267", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-28T21:16:56.267", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/commit/f21dbd7d0a0c63cdd41954ba5d0f05def4e0f2b3"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/pull/2477"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/releases/tag/v20.14.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-5fpq-26gf-qwcr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-565"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-10-28T22:00:18.013546+00:00", "updated": "2026-10-28T22:00:18.013553+00:00", "vendors": []}