{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-4525","assignerOrgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","state":"PUBLISHED","assignerShortName":"HashiCorp","dateReserved":"2026-03-20T17:47:40.835Z","datePublished":"2026-04-17T03:00:47.561Z","dateUpdated":"2026-04-17T17:22:41.255Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Vault","repo":"https://github.com/hashicorp/vault","vendor":"HashiCorp","versions":[{"lessThan":"2.0.0","status":"affected","version":"0.11.2","versionType":"semver"}]},{"defaultStatus":"unaffected","platforms":["64 bit","32 bit","x86","ARM","MacOS","Windows","Linux"],"product":"Vault Enterprise","repo":"https://github.com/hashicorp/vault","vendor":"HashiCorp","versions":[{"changes":[{"at":"1.19.16","status":"unaffected"},{"at":"1.20.10","status":"unaffected"},{"at":"1.21.5","status":"unaffected"}],"lessThan":"2.0.0","status":"affected","version":"0.11.2","versionType":"semver"}]}],"credits":[{"lang":"en","value":"This issue was identified and reported by Oleh Konko of 1seal."}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.</p><br/>"}],"value":"If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16."}],"impacts":[{"capecId":"CAPEC-118","descriptions":[{"lang":"en","value":"CAPEC-118: Collect and Analyze Information"}]}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-201","description":"CWE-201: Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"67fedba0-ff2e-4543-ba5b-aa93e87718cc","shortName":"HashiCorp","dateUpdated":"2026-04-17T17:22:41.255Z"},"references":[{"url":"https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"}],"source":{"advisory":"HCSEC-2026-08","discovery":"EXTERNAL"},"title":"Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-17T13:19:26.452614Z","id":"CVE-2026-4525","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-17T13:19:32.463Z"}}]}}