{"id":"CVE-2026-25949","aliases":["GHSA-89p3-4642-cr2w","GO-2026-4484"],"url":"https://o3.security/vulnerability/CVE-2026-25949","summary":"Traefik: TCP readTimeout bypass via STARTTLS on Postgres","details":"Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.8, there is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint respondingTimeouts.readTimeout by sending the 8-byte Postgres SSLRequest (STARTTLS) prelude and then stalling, causing connections to remain open indefinitely, leading to a denial of service. This vulnerability is fixed in 3.6.8.","published":"2026-02-12T20:01:19.600Z","modified":"2026-08-12T03:51:16.429694326Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/traefik/traefik/v3","fixedVersion":"3.6.8"}],"fix":{"url":"https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678","label":"traefik/traefik@31e566e"},"references":[{"type":"WEB","url":"https://github.com/traefik/traefik/releases/tag/v3.6.8"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:6192"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-25949"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25949.json"},{"type":"ADVISORY","url":"https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25949"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439522"},{"type":"FIX","url":"https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.429694326Z"}}