{"id":"GHSA-c36x-h252-g9x2","summary":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808","details":"### Summary\n\nOpenBao users with access to the `sys/leases/revoke/:lease_id` endpoint in any namespace can revoke leases in any other namespace as long as the lease identifier is known to them, bypassing ACLs that should apply for cross-namespace revocations.\n\n### Impact\n\nOpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked by a user in another tenant.\n\n### Patch\n\nThis will be fixed in OpenBao v2.5.5.\n\n### References\n\nThis vulnerability is similar to but distinct from:\n\n- CVE-2026-45808 / GHSA-v8v8-cm84-m686\n- CVE-2026-40264 / GHSA-p49j-v9wc-wg57","aliases":["BIT-openbao-2026-55774","CVE-2026-55774","GO-2026-5304"],"modified":"2026-09-25T14:25:47.039505036Z","published":"2026-06-19T21:42:04Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-06-19T21:42:04Z","nvd_published_at":null,"cwe_ids":["CWE-863"],"severity":"LOW"},"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2"},{"type":"WEB","url":"https://github.com/openbao/openbao/pull/3307"},{"type":"WEB","url":"https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37"},{"type":"PACKAGE","url":"https://github.com/openbao/openbao"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.5"}],"affected":[{"package":{"name":"github.com/openbao/openbao","ecosystem":"Go","purl":"pkg:golang/github.com/openbao/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.1.0"},{"last_affected":"2.5.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c36x-h252-g9x2/GHSA-c36x-h252-g9x2.json"}},{"package":{"name":"github.com/openbao/openbao","ecosystem":"Go","purl":"pkg:golang/github.com/openbao/openbao"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20260617103932-b20b999dd404"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-c36x-h252-g9x2/GHSA-c36x-h252-g9x2.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}]}