CVE Explorer
CVE-2025-66490
Traefik is an HTTP reverse proxy and load balancer. For versions prior to 2.11.32 and 2.11.31 through 3.6.2, requests using PathPrefix, Path or PathRegex matchers can bypass path normalization. When Traefik uses path-based routing, requests containing URL-encoded restricted characters (/, \, Null, ;, ?, #) can bypass the middleware chain and reach unintended backends. For example, a request to http://mydomain.example.com/admin%2F could reach service-a without triggering my-security-middleware, b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"traefik","vendor":"traefik","versions":[{"status":"affected","version":"github.com/traefik/traefik/v3 < 3.6.3"},{"status":"affected","version":"github.com/traefik/traefik/v2 < 2.11.32"},{"status":"affected","version":"github.com/traefik/traefik <= 1.7.34"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-436","description":"CWE-436: Interpretation Conflict","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/traefik/traefik/releases/tag/v2.11.32","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v2.11.32"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/references/1
{"name":"https://github.com/traefik/traefik/releases/tag/v3.6.4","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.6.4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/references/2
{"name":"https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-gm3x-23wp-hc2c"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b9e8280d9fd1a41fb7aae1e63a7420a677faec02e88207b823c03145c970f8f1 · sha256:bf17802d90e0e6c5… · /containers/adp/0/references/0
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.