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CVE-2026-42273

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs host matching in a case-sensitive manner, while HTTP hostnames are case-insensitive. This discrepancy can result in heimdall failing to match a rule for a request host that differs only in letter casing, potentially causing the request to be classified differently than intended. This issue has been patched in version 0.17.14.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:971ba4e01cfabc00218987ff93d84ac6e5b6cc21f87739765463c62cab6be554
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-436","description":"CWE-436: Interpretation Conflict","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-178","description":"CWE-178: Improper Handling of Case Sensitivity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"heimdall","vendor":"dadrus","versions":[{"status":"affected","version":"< 0.17.14"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/affected/0

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:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-436","description":"CWE-436: Interpretation Conflict","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-178","description":"CWE-178: Improper Handling of Case Sensitivity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/dadrus/heimdall/commit/3d05e56a9e7ef0355f17482b4322054af4e85943","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/commit/3d05e56a9e7ef0355f17482b4322054af4e85943"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/references/2
{"name":"https://github.com/dadrus/heimdall/pull/3208","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/pull/3208"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/references/1
{"name":"https://github.com/dadrus/heimdall/releases/tag/v0.17.14","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/releases/tag/v0.17.14"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /containers/cna/references/3
{"name":"https://github.com/dadrus/heimdall/security/advisories/GHSA-72h4-mxfc-jx37","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dadrus/heimdall/security/advisories/GHSA-72h4-mxfc-jx37"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de957f48680cf4ac3446da5776456ace19ccf0d9dd9e51ae662e494e63c98496 · sha256:2b3b5e2e5638a454… · /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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