CVE-2026-25949CWE-400

Traefik: TCP readTimeout bypass via STARTTLS on Postgres

High · published February 12, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
59.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00913 · 59.7th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-02-12T20:01Z
EPSS history
Timeline
  • 12 FEB 20:01Z
    Traefik: TCP readTimeout bypass via STARTTLS on Postgres
    cvelistv5