CVE-2026-65602High· 8.8▾ TwilightTraefik 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 …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Aug 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
0.2% → 0.3%
Last analysed / modified upstream
— → 8.8
medium → high
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.
traefik >= 3.6.0, < 3.6.23traefik >= 3.7.0, < 3.7.7Upgrade past the affected range:
traefik 3.7.7Affected packages:
github.com/traefik/traefik/v3 >= 3.6.0, <= 3.6.22github.com/traefik/traefik/v3 >= 3.7.0, <= 3.7.6Patched in:
github.com/traefik/traefik/v3 3.6.23github.com/traefik/traefik/v3 3.7.7Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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