{"id":"CVE-2026-45808","aliases":["BIT-openbao-2026-45808","GHSA-v8v8-cm84-m686","GO-2026-5657"],"url":"https://o3.security/vulnerability/CVE-2026-45808","summary":"OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL","details":"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.","published":"2026-08-07T21:15:00.733Z","modified":"2026-08-17T08:10:40.466266903Z","cvss":null,"epss":{"score":0.00308,"percentile":0.23524,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":"2.5.4"}],"fix":{"url":"https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c","label":"openbao/openbao@c049564"},"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45808.json"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45808"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/3152"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-17T08:10:40.466266903Z"}}