CVE-2026-65602
Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
22/07/2026
Last modified:
06/08/2026
Description
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.
Impact
Base Score 4.0
5.30
Severity 4.0
MEDIUM
Base Score 3.x
8.80
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.6.0 (including) | 3.6.23 (excluding) |
| cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* | 3.7.0 (including) | 3.7.7 (excluding) |
To consult the complete list of CPE names with products and versions, see this page