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.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-89p3-4642-cr2w Traefik: TCP readTimeout bypass via STARTTLS on Postgres
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 20 Feb 2026 18:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*

Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Traefik
Traefik traefik
Vendors & Products Traefik
Traefik traefik

Fri, 13 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Important


Thu, 12 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 12 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title Traefik: TCP readTimeout bypass via STARTTLS on Postgres
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-12T21:16:17.659Z

Reserved: 2026-02-09T17:13:54.065Z

Link: CVE-2026-25949

cve-icon Vulnrichment

Updated: 2026-02-12T21:15:53.389Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-12T20:16:11.227

Modified: 2026-02-20T18:44:41.160

Link: CVE-2026-25949

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-12T20:01:19Z

Links: CVE-2026-25949 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-13T21:29:27Z

Weaknesses