CVE-2026-25949

high

Description

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.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25949.json

https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w

https://github.com/traefik/traefik/releases/tag/v3.6.8

https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-6207

https://bugzilla.redhat.com/show_bug.cgi?id=2439522

https://access.redhat.com/security/cve/CVE-2026-25949

https://access.redhat.com/errata/RHSA-2026:6192

Details

Source: Mitre, NVD

Published: 2026-02-12

Updated: 2026-07-15

Named Vulnerability: GO-2026-4484Named Vulnerability: GHSA-89p3-4642-cr2w

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00913