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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/traefik/traefik/commit/31e566e9f1d7888ccb6fbc18bfed427203c35678	Patch
https://github.com/traefik/traefik/releases/tag/v3.6.8	Product Release Notes
https://github.com/traefik/traefik/security/advisories/GHSA-89p3-4642-cr2w	Patch Vendor Advisory
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-12 20:16

Updated : 2026-07-15 02:18

NVD link : CVE-2026-25949

Mitre link : CVE-2026-25949

CVE.ORG link : CVE-2026-25949

JSON object : View

Products Affected

traefik

traefik

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

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