{"id":"CVE-2026-69214","aliases":["GHSA-wv64-j4fq-5f9x"],"url":"https://o3.security/vulnerability/CVE-2026-69214","summary":"Http4s: CookieJar middleware accepts arbitrary Set-Cookie domain","details":"Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware stores a response cookie’s Domain attribute without checking that it domain-matches the host that supplied the cookie or rejecting public suffixes. A malicious or compromised server contacted through the same CookieJar can plant a cookie for another domain, and the jar later sends that cookie to the victim domain, enabling session fixation or overwriting security-sensitive cookies. The patch validates the Set-Cookie domain against the response origin, although public-suffix rejection remains unimplemented. This issue is fixed in versions 0.23.35 and 1.0.0-M47.","published":"2026-09-15T19:04:05.469Z","modified":"2026-09-17T03:47:19.519262725Z","cvss":{"score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.12","fixedVersion":"0.23.35"},{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.13","fixedVersion":"0.23.35"},{"ecosystem":"Maven","name":"org.http4s:http4s-client_2.13","fixedVersion":"1.0.0-M47"},{"ecosystem":"Maven","name":"org.http4s:http4s-client_3","fixedVersion":"1.0.0-M47"},{"ecosystem":"Maven","name":"org.http4s:http4s-client_3","fixedVersion":"0.23.35"}],"fix":{"url":"https://github.com/http4s/http4s/commit/87535f7288f3baaf6736e2735087e473762b5b2f","label":"http4s/http4s@87535f7"},"references":[{"type":"WEB","url":"https://github.com/http4s/http4s/releases/tag/v0.23.35"},{"type":"WEB","url":"https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69214.json"},{"type":"ADVISORY","url":"https://github.com/http4s/http4s/security/advisories/GHSA-wv64-j4fq-5f9x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69214"},{"type":"FIX","url":"https://github.com/http4s/http4s/commit/87535f7288f3baaf6736e2735087e473762b5b2f"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-17T03:47:19.519262725Z"}}