{"schemaVersion":3,"id":"CVE-2026-45808","aliases":["GHSA-v8v8-cm84-m686","BIT-openbao-2026-45808","GO-2026-5657"],"status":"published","duplicateOf":null,"title":"OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL","description":"OpenBao is an open source identity-based secrets management system. Prior to version 2.5.4, OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked or renewed by a user in another tenant via the legacy, undocumented `sys/revoke` and `sys/renew` endpoints. This is fixed in OpenBao v2.5.4.","dates":{"published":"2026-08-07T21:15:00.733Z","modified":"2026-08-13T18:42:47.586Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":7.1,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Go","score":7.1,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":7.1,"severity":"high","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00427,"percentile":0.35946,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.11900000000000005,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.00308},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00427,"percentile":0.35946}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00308,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00427,"percentile":0.35946}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"github.com/openbao","product":"openbao","name":"github.com/openbao/openbao","label":"openbao","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/openbao/openbao","purlType":"golang","versions":[{"text":"< 2.5.4","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"< 2.5.4 | All versions (No fix recorded)","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openbao","label":"OpenBao","category":"server-app"}},"hubHref":null},{"vendor":"openbao","product":"openbao","name":"openbao","label":"openbao","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.5.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.5.4","eol":{"isEol":null,"eolDate":null,"matchMethod":"name_exact","cycle":null,"product":{"name":"openbao","label":"OpenBao","category":"server-app"}},"hubHref":"/vendor/openbao/openbao"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686","label":"github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Advisory"]},{"url":"https://github.com/openbao/openbao/pull/3152","label":"github.com/openbao/openbao/pull/3152","hostname":"github.com","tags":["X Refsource MISC","WEB","FIX"]},{"url":"https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c","label":"github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c","hostname":"github.com","tags":["X Refsource MISC","WEB","FIX"]},{"url":"https://github.com/openbao/openbao/releases/tag/v2.5.4","label":"github.com/openbao/openbao/releases/tag/v2.5.4","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/openbao/openbao","label":"github.com/openbao/openbao","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:10835-1","OPENSUSE-SU-2026:21483-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:10835-1","OPENSUSE-SU-2026:21483-1"]},"timeline":[{"kind":"published","date":"2026-08-07T21:15:00.733Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-13T18:42:47.586Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T21:10:16.149Z","stale":false,"partial":false}}