{"id":"CVE-2026-25949","title":"Traefik is an HTTP reverse proxy and load balancer","summary":"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 sendi…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-770"],"vendor":"traefik","product":"traefik","affected":["traefik < 3.6.8"],"patched":["traefik 3.6.8"],"published":"2026-02-12","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-25949","references":[{"url":"https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/releases/tag/v3.6.8","label":"security-advisories@github.com"},{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w","label":"security-advisories@github.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:6192","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-25949","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439522","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00722,"epssPercentile":0.52095,"ingestedAt":"2026-07-03T18:53:52.420Z","slug":"CVE-2026-25949","body":"## Overview\n\nTraefik 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.\n\n## Affected\n\n- `traefik < 3.6.8`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `traefik 3.6.8`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}