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CVE-2026-65600

Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a craf
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6c62d28d2005daf869e6108dc892fa3daa0925d074eb8888713af87b13f30df2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 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:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/affected/1

{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"2.11.52","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.11.52","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /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:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/affected/2

Affected products and versions

3 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:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/affected/1
{"defaultStatus":"unaffected","packageURL":"pkg:golang/Traefik","product":"traefik","vendor":"traefik","versions":[{"lessThan":"2.11.52","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.11.52","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /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:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"GitHub Security Advisory (GHSA-cxjq-mrr5-89rv)","tags":["vendor-advisory"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-cxjq-mrr5-89rv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Traefik before v2.11.52 Authentication Bypass via ReplacePathRegex","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/traefik-before-authentication-bypass-via-replacepathregex"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec645f1ee4a1d5328dc34b1523bb7cf8d7409168b661b6a334d0d1bfaf258223 · sha256:ad038f01c8fc6d75… · /containers/cna/references/1

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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