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CVE-2026-65602

MEDIUM
5.3
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-65602
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-22 10:48 UTC
Published
2026-07-22 11:21 UTC
Last updated
2026-07-22 13:04 UTC
Primary CWE
CWE-863
Incorrect Authorization
Vendor / Product
traefik / traefik
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (2)
VendorProductPlatformVersions
traefik traefik — 3.6.0 < 3.6.23, 3.6.23
traefik traefik — 3.7.0 < 3.7.7, 3.7.7
Weakness (CWE)
CWESourceDescription
CWE-863 cna Incorrect Authorization
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
References (3)
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