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Vulnerability Details CVE-2026-65602

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.7%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2026-65602
  • Traefik » Traefik » Version: 3.6.0
    cpe:2.3:a:traefik:traefik:3.6.0
  • Traefik » Traefik » Version: 3.6.1
    cpe:2.3:a:traefik:traefik:3.6.1
  • Traefik » Traefik » Version: 3.6.10
    cpe:2.3:a:traefik:traefik:3.6.10
  • Traefik » Traefik » Version: 3.6.11
    cpe:2.3:a:traefik:traefik:3.6.11
  • Traefik » Traefik » Version: 3.6.12
    cpe:2.3:a:traefik:traefik:3.6.12
  • Traefik » Traefik » Version: 3.6.13
    cpe:2.3:a:traefik:traefik:3.6.13
  • Traefik » Traefik » Version: 3.6.14
    cpe:2.3:a:traefik:traefik:3.6.14
  • Traefik » Traefik » Version: 3.6.15
    cpe:2.3:a:traefik:traefik:3.6.15
  • Traefik » Traefik » Version: 3.6.16
    cpe:2.3:a:traefik:traefik:3.6.16
  • Traefik » Traefik » Version: 3.6.17
    cpe:2.3:a:traefik:traefik:3.6.17
  • Traefik » Traefik » Version: 3.6.18
    cpe:2.3:a:traefik:traefik:3.6.18
  • Traefik » Traefik » Version: 3.6.19
    cpe:2.3:a:traefik:traefik:3.6.19
  • Traefik » Traefik » Version: 3.6.2
    cpe:2.3:a:traefik:traefik:3.6.2
  • Traefik » Traefik » Version: 3.6.20
    cpe:2.3:a:traefik:traefik:3.6.20
  • Traefik » Traefik » Version: 3.6.21
    cpe:2.3:a:traefik:traefik:3.6.21
  • Traefik » Traefik » Version: 3.6.22
    cpe:2.3:a:traefik:traefik:3.6.22
  • Traefik » Traefik » Version: 3.6.3
    cpe:2.3:a:traefik:traefik:3.6.3
  • Traefik » Traefik » Version: 3.6.4
    cpe:2.3:a:traefik:traefik:3.6.4
  • Traefik » Traefik » Version: 3.6.5
    cpe:2.3:a:traefik:traefik:3.6.5
  • Traefik » Traefik » Version: 3.6.6
    cpe:2.3:a:traefik:traefik:3.6.6
  • Traefik » Traefik » Version: 3.6.7
    cpe:2.3:a:traefik:traefik:3.6.7
  • Traefik » Traefik » Version: 3.6.8
    cpe:2.3:a:traefik:traefik:3.6.8
  • Traefik » Traefik » Version: 3.6.9
    cpe:2.3:a:traefik:traefik:3.6.9


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