CVE-2026-25949

Traefik: TCP readTimeout bypass via STARTTLS on Postgres

Published: Feb 12, 2026Updated: Jul 15, 2026 Sources: CVE List NVD GHSACWE-400

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-400 CWE-770

Affected Products

traefik

oss-projectaka traefik enterprise

traefikOn-prem

Networking Infrastructure / load-balancer-proxy

package-ecosystem

github.com/traefik/traefik/v3

OSS Libraries

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

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

github.com

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

github.com

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

github.com

and 6 more references View all →

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