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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 — in
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2387dd5e7ed879a9a775b505857d400d0f95b0a33f08840bbddc46a7804d0f2b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"3.6.23","status":"affected","version":"3.6.0","versionType":"semver"},{"status":"unaffected","version":"3.6.23","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/affected/0

{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"3.7.7","status":"affected","version":"3.7.0","versionType":"semver"},{"status":"unaffected","version":"3.7.7","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"3.6.23","status":"affected","version":"3.6.0","versionType":"semver"},{"status":"unaffected","version":"3.6.23","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/affected/0
{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"3.7.7","status":"affected","version":"3.7.0","versionType":"semver"},{"status":"unaffected","version":"3.7.7","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/references/1
{"name":"GitHub Security Advisory (GHSA-42cj-m3vj-89wv)","tags":["vendor-advisory"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-42cj-m3vj-89wv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Traefik before 3.6.23 IngressRouteTCP ServersTransport Namespace Bypass","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/traefik-before-ingressroutetcp-serverstransport-namespace-bypass"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c7d3d0730991889884ea87eda2bea47af3ac587401a68c0a9c0d7cea0bf7b7e9 · sha256:7c4d40bdea1521e3… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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