CVE-2026-65602
Published:July 22, 2026
Updated:August 05, 2026
Traefik 3.6.0 through 3.6.22 and 3.7.0 through 3.7.6 fail to enforce the crossProviderNamespaces allowlist for IngressRouteTCP service serversTransport references (the allowlist was only enforced for HTTP serversTransport references). A low-privileged Kubernetes user in a namespace not listed in crossProviderNamespaces can set serversTransport: foo@file on an IngressRouteTCP service, causing Traefik to accept the forbidden cross-provider reference and use a file-provider TCPServersTransport — including privileged backend mTLS client certificates, SPIFFE identity, or PROXY-protocol settings. This is fixed in 3.6.23 and 3.7.7.
Affected Packages
https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v3.7.0 <v3.7.7Fix Suggestion:
Update to version v3.7.7https://github.com/traefik/traefik.git (GITHUB):
Affected version(s) >=v3.6.0 <v3.6.23Fix Suggestion:
Update to version v3.6.23github.com/traefik/traefik/v3 (GO):
Affected version(s) >=v3.7.0 <v3.7.7Fix Suggestion:
Update to version v3.7.7github.com/traefik/traefik/v3 (GO):
Affected version(s) >=v3.7.0 <v3.7.7Fix Suggestion:
Update to version v3.7.7github.com/traefik/traefik/v3 (GO):
Affected version(s) >=v3.6.0 <v3.6.23Fix Suggestion:
Update to version v3.6.23Related Resources (10)
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Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.16