{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42274","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-26T11:53:27.707Z","datePublished":"2026-05-08T03:43:41.597Z","dateUpdated":"2026-05-11T18:20:15.059Z"},"containers":{"cna":{"title":"Heimdall: Authorization bypass via path normalization mismatch","problemTypes":[{"descriptions":[{"cweId":"CWE-35","lang":"en","description":"CWE-35: Path Traversal: '.../...//'","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-436","lang":"en","description":"CWE-436: Interpretation Conflict","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":7.8,"baseSeverity":"HIGH","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"}}],"references":[{"name":"https://github.com/dadrus/heimdall/security/advisories/GHSA-3q34-rx83-r6mq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dadrus/heimdall/security/advisories/GHSA-3q34-rx83-r6mq"},{"name":"https://github.com/dadrus/heimdall/pull/3209","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/pull/3209"},{"name":"https://github.com/dadrus/heimdall/commit/b5dfa484b7a8c2ce6d8691c026f9da867719947a","tags":["x_refsource_MISC"],"url":"https://github.com/dadrus/heimdall/commit/b5dfa484b7a8c2ce6d8691c026f9da867719947a"},{"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"}],"affected":[{"vendor":"dadrus","product":"heimdall","versions":[{"version":"< 0.17.14","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-05-08T03:43:41.597Z"},"descriptions":[{"lang":"en","value":"Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs rule matching on the raw (non-normalized) request path, while downstream components may normalize dot-segments according to RFC 3986, Section 6.2.2.3. This discrepancy can result in heimdall authorizing a request for one path (e.g., /user/../admin, or URL-encoded variants such as /user/%2e%2e/admin or /user/%2e%2e%2fadmin. The latter would require the allow_encoded_slashes option to be set to on or no_decode.) while the downstream ultimately processes a different, normalized path (/admin). This issue has been patched in version 0.17.14."}],"source":{"advisory":"GHSA-3q34-rx83-r6mq","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-11T18:19:37.764124Z","id":"CVE-2026-42274","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-11T18:20:15.059Z"}}]}}