CVE-2026-25949

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.

Score

CVSS 3.1 7.5 High

Status

Modified - security-advisories@github.com

Published

2026-02-12

Last modified

2026-07-15

Weaknesses

CWE-400, CWE-770

Affected products

• Openshift Devspaces (Redhat)
• Traefik (Traefik)

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
• https://access.redhat.com/errata/RHSA-2026:6192
• https://access.redhat.com/security/cve/CVE-2026-25949
• https://bugzilla.redhat.com/show_bug.cgi?id=2439522
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json