{"action":"Upgrade happy-dom to 20.8.9 or later.","affected":[{"fixed":"20.8.9","introduced":"0"}],"component":"happy-dom","cve_ids":["CVE-2026-34226"],"ecosystem":"npm","epss":0.00466,"exploited":false,"fixed_versions":["20.8.9"],"ghsa_id":"GHSA-w4gp-fjgq-3q4g","id":"tcs_01M5KGDVZNMB5YB5HXH7F962AZ","modified_at":"2026-03-29T15:41:19.915766Z","published_at":"2026-03-29T15:23:57Z","references":["https://osv.dev/vulnerability/GHSA-w4gp-fjgq-3q4g","https://github.com/capricorn86/happy-dom/security/advisories/GHSA-w4gp-fjgq-3q4g","https://nvd.nist.gov/vuln/detail/CVE-2026-34226","https://github.com/capricorn86/happy-dom/pull/2117","https://github.com/capricorn86/happy-dom/commit/68324c21d7b98f53f7bb5a7b3e185bda7106e751","https://github.com/capricorn86/happy-dom","https://github.com/capricorn86/happy-dom/blob/f8d8cad41e9722fab9eefb9dfb3cca696462e908/packages/happy-dom/src/fetch/utilities/FetchRequestHeaderUtility.ts","https://github.com/capricorn86/happy-dom/releases/tag/v20.8.9"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-w4gp-fjgq-3q4g","url":"https://osv.dev/vulnerability/GHSA-w4gp-fjgq-3q4g"}],"summary":"Happy DOM's fetch credentials include uses page-origin cookies instead of target-origin cookies"}