CVE-2026-25949

EUVD-2026-6207
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub_MCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 3%
Affected Products (NVD)
VendorProductVersion
traefiktraefik
𝑥
< 3.6.8
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678
https://github.com/traefik/traefik/releases/tag/v3.6.8
https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w