{"id":"CVE-2026-118661","revision":"148612a7500b4e368624e170e0fd3dde","records":[{"revision":"148612a7500b4e368624e170e0fd3dde","observedAt":"2026-10-28T21:57:06.789+00:00","statement":{"source":"nvd","id":"CVE-2026-118661","aliases":[],"title":"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…","description":"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.","state":0,"publishedAt":"2026-10-28T21:16:56.267+00:00","modifiedAt":"2026-10-28T21:16:56.267+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/capricorn86/happy-dom/commit/f21dbd7d0a0c63cdd41954ba5d0f05def4e0f2b3","https://github.com/capricorn86/happy-dom/pull/2477","https://github.com/capricorn86/happy-dom/releases/tag/v20.14.6","https://github.com/capricorn86/happy-dom/security/advisories/GHSA-5fpq-26gf-qwcr"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-118661","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Received","weaknesses":["CWE-565"],"productCriteria":[],"sourceDates":{"published":"2026-10-28T21:16:56.267","lastModified":"2026-10-28T21:16:56.267"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-118661","identifiers":["CVE-2026-118661"]},"retained":false,"historicalAffected":[]}],"coverage":[]}