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CVE-2026-29777

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.10, A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query parameter match values. In shared gateway deployments, this can bypass listener hostname constraints and redirect traffic for victim hostnames to attacker-controlled backends. This vulnerability is fixed in 3.6.10.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:29a144df4c175753b224f1d45fd4e423f35d120707c36f8698cb61d7a521226b
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":"< 3.6.10"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:61309ccd2ba0b958c28211dad14b1e7327490e1a30031d2beb5e9ee27feb76a6 · sha256:61875aa80e6df68a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.1,"baseSeverity":"MEDIUM","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:61309ccd2ba0b958c28211dad14b1e7327490e1a30031d2beb5e9ee27feb76a6 · sha256:61875aa80e6df68a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-74","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:61309ccd2ba0b958c28211dad14b1e7327490e1a30031d2beb5e9ee27feb76a6 · sha256:61875aa80e6df68a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/traefik/traefik/releases/tag/v3.6.10","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.6.10"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:61309ccd2ba0b958c28211dad14b1e7327490e1a30031d2beb5e9ee27feb76a6 · sha256:61875aa80e6df68a… · /containers/cna/references/1
{"name":"https://github.com/traefik/traefik/security/advisories/GHSA-8q2w-wr49-whqj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-8q2w-wr49-whqj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:61309ccd2ba0b958c28211dad14b1e7327490e1a30031d2beb5e9ee27feb76a6 · sha256:61875aa80e6df68a… · /containers/cna/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.

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