{"id":"GHSA-v8v8-cm84-m686","summary":"OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL","details":"# Impact\n\nOpenBao'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.\n\n# Patch\n\nThis will be addressed in v2.5.4.","aliases":["BIT-openbao-2026-45808","CVE-2026-45808","GO-2026-5657"],"modified":"2026-08-17T08:11:08.650039355Z","published":"2026-05-28T17:37:32Z","database_specific":{"github_reviewed_at":"2026-05-28T17:37:32Z","nvd_published_at":null,"cwe_ids":["CWE-863"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686"},{"type":"WEB","url":"https://github.com/openbao/openbao/pull/3152"},{"type":"WEB","url":"https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c"},{"type":"PACKAGE","url":"https://github.com/openbao/openbao"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.4"}],"affected":[{"package":{"name":"github.com/openbao/openbao","ecosystem":"Go","purl":"pkg:golang/github.com/openbao/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.5.4"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2.5.3","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-v8v8-cm84-m686/GHSA-v8v8-cm84-m686.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}