{"id":"CVE-2026-8924","aliases":["CURL-CVE-2026-8924"],"url":"https://o3.security/vulnerability/CVE-2026-8924","summary":"trailing dot domain super cookie","details":"A flaw in curl’s cookie parsing logic allows a malicious HTTP server to set\n\"super cookies\" that bypass the Public Suffix List check. This enables an\nattacker-controlled origin to inject cookies that curl subsequently scopes and\ntransmits to unrelated third-party domains.","published":"2026-07-03T06:15:04.646Z","modified":"2026-09-22T12:41:42.131085836Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.0056,"percentile":0.44786,"asOf":"2026-09-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8924.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2026-8924.json"},{"type":"WEB","url":"https://hackerone.com/reports/3733905"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8924.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8924"},{"type":"PACKAGE","url":"https://github.com/curl/curl.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-22T12:41:42.131085836Z"}}