{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34226", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-26T16:22:29.033Z", "datePublished": "2026-03-27T21:17:24.777Z", "dateUpdated": "2026-03-27T21:17:24.777Z"}, "containers": {"cna": {"title": "Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies", "problemTypes": [{"descriptions": [{"cweId": "CWE-201", "lang": "en", "description": "CWE-201: Insertion of Sensitive Information Into Sent Data", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-359", "lang": "en", "description": "CWE-359: Exposure of Private Personal Information to an Unauthorized Actor", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g"}, {"name": "https://github.com/capricorn86/happy-dom/pull/2117", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/pull/2117"}, {"name": "https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751"}, {"name": "https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts"}, {"name": "https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9"}], "affected": [{"vendor": "capricorn86", "product": "happy-dom", "versions": [{"version": "< 20.8.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-27T21:17:24.777Z"}, "descriptions": [{"lang": "en", "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Versions prior to 20.8.9 may attach cookies from the current page origin (`window.location`) instead of the request target URL when `fetch(..., { credentials: \"include\" })` is used. This can leak cookies from origin A to destination B. Version 20.8.9 fixes the issue."}], "source": {"advisory": "GHSA-w4gp-fjgq-3q4g", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Versions prior to 20.8.9 may attach cookies from the current page origin (`window.location`) instead of the request target URL when `fetch(..., { credentials: \"include\" })` is used. This can leak cookies from origin A to destination B. Version 20.8.9 fixes the issue."}], "id": "CVE-2026-34226", "lastModified": "2026-03-27T22:16:23.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-27T22:16:23.113", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/pull/2117"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-201"}, {"lang": "en", "value": "CWE-359"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}