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CVE-2026-42272

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes (%2F) in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent (%2f) is not recognized and therefore not processed as expected when allow_encoded_slashes is set to off (the default setting). This discrepancy can lead to differences in how request paths are interpreted by heimdall and
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:324f68a1c4112d5abb1b327e84fad6340787e4d6d7b60faeb104c1aa66d078cc
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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/commit/8b0de6aba23a047cfee3081df878271bb17f4351"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /containers/cna/references/2
{"name":"https://github.com/dadrus/heimdall/pull/3207","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/pull/3207"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /containers/cna/references/3
{"name":"https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dadrus/heimdall/security/advisories/GHSA-43jv-5j4x-qv67"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:de55a8ea08b3273d0d7774ad9153d6f3f25e583fb50da8afff0bc1a8cc3db9be · sha256:653c2219acc77973… · /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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