{"id":"CVE-2026-55774","summary":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808","details":"OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an OpenBao user with access to sys/leases/revoke/:lease_id in one namespace could revoke a lease in another namespace when the foreign lease_id was known, bypassing namespace ACL isolation. The affected lease lookup routing in vault/expiration.go allowed FetchLeaseInfo and loadEntry to resolve cached or stored lease data outside the request namespace, allowing a tenant that intentionally disclosed a lease identifier to have the lease and its underlying credential revoked by another tenant. This issue is fixed in version 2.5.5.","aliases":["GHSA-c36x-h252-g9x2","GO-2026-5304"],"modified":"2026-09-17T03:47:26.963968416Z","published":"2026-09-15T15:42:03.157Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55774.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-863"]},"references":[{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.5.5"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55774.json"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55774"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/3307"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/3310"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openbao/openbao","events":[{"introduced":"0"},{"fixed":"9ba1413d793223cca67db12434093a2f25fdc540"},{"fixed":"b20b999dd4044d7b419a5472d8fe08407828be37"},{"fixed":"028992583c693c4de6350b8aa52ff85e30375a99"},{"fixed":"03e3a243b6f07d17c60ce0a182adee7cf4c424eb"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.5.5"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["sdk/v2.6.1","v2.6.0-beta20260622","sdk/v2.6.0","api/v2.6.0","api/auth/userpass/v2.6.0","api/auth/ldap/v2.6.0","api/auth/kubernetes/v2.6.0","api/auth/jwt/v2.6.0","api/auth/approle/v2.6.0","v2.5.4","v2.5.3","v2.5.2","v2.5.1","v2.5.0","sdk/v2.5.1","api/v2.5.1","api/auth/userpass/v2.5.1","api/auth/ldap/v2.5.1","api/auth/kubernetes/v2.5.1","api/auth/jwt/v2.5.1","api/auth/approle/v2.5.1","v2.5.0-beta20251125","sdk/v2.5.0","api/v2.5.0","api/auth/userpass/v2.5.0","api/auth/ldap/v2.5.0","api/auth/kubernetes/v2.5.0","api/auth/jwt/v2.5.0","api/auth/approle/v2.5.0","v2.4.0","sdk/v2.4.0","api/v2.4.0","api/auth/userpass/v2.4.0","api/auth/ldap/v2.4.0","api/auth/kubernetes/v2.4.0","api/auth/jwt/v2.4.0","api/auth/approle/v2.4.0","v2.3.0-beta20250528","sdk/v2.3.0","api/v2.3.0","api/auth/userpass/v2.3.0","api/auth/ldap/v2.3.0","api/auth/kubernetes/v2.3.0","api/auth/approle/v2.3.0","dev-namespaces-base-20250424","dev-namespaces-base-20250311","v2.2.0-beta20250213","dev-namespaces-base-20250215","sdk/v2.2.0","api/v2.2.0","api/auth/userpass/v2.2.0","api/auth/ldap/v2.2.0","api/auth/kubernetes/v2.2.0","api/auth/approle/v2.2.0","v2.1.0-beta20241114.3","v2.1.0-beta20241114.2","v2.1.0-beta20241114.1","v2.1.0-beta20241114","sdk/v2.1.0","api/v2.1.0","v2.0.0","sdk/v2.0.1","api/v2.0.1","api/auth/userpass/v2.0.1","api/auth/ldap/v2.0.1","api/auth/kubernetes/v2.0.1","api/auth/approle/v2.0.1","v2.0.0-beta20240618","sdk/v1.100.0-development20240408","api/v1.100.0-development20240408","api/auth/userpass/v1.1.0-development20240408","api/auth/ldap/v1.1.0-development20240408","api/auth/kubernetes/v1.1.0-development20240408","api/auth/gcp/v1.1.0-development20240408","api/auth/azure/v1.1.0-development20240408","api/auth/aws/v1.1.0-development20240408","api/auth/approle/v1.1.0-development20240408","v2.0.0-alpha20240329","before-plugin-removal","api/auth/userpass/v0.4.1","api/auth/gcp/v0.4.1","api/auth/azure/v0.4.1","api/auth/aws/v0.4.1","api/auth/approle/v0.4.1","sdk/v0.9.1","api/v1.9.2","api/v1.9.1","sdk/v0.9.0","api/auth/userpass/v0.4.0","api/auth/gcp/v0.4.0","api/auth/azure/v0.4.0","api/auth/aws/v0.4.0","api/auth/approle/v0.4.0","sdk/v0.8.0","api/v1.9.0","api/v1.8.3","sdk/v0.7.0","sdk/v0.6.2","sdk/v0.6.1","api/v1.8.2","api/v1.8.1","api/auth/userpass/v0.3.0","api/auth/gcp/v0.3.0","api/auth/azure/v0.3.0","api/auth/aws/v0.3.0","api/auth/approle/v0.3.0","api/v1.8.0","sdk/v0.6.0","api/auth/userpass/v0.2.0","api/auth/gcp/v0.2.0","api/auth/azure/v0.2.0","api/auth/aws/v0.2.0","api/auth/approle/v0.2.0","sdk/v0.5.3","api/v1.7.2","sdk/v0.5.1","api/v1.7.1","api/v1.7.0","api/v1.6.0","sdk/v0.5.0","api/v1.5.0","sdk/v0.4.1","api/v1.3.1","api/auth/approle/v0.1.1","api/auth/gcp/v0.1.0","api/auth/azure/v0.1.0","api/auth/userpass/v0.1.0","api/auth/aws/v0.1.0","api/auth/approle/v0.1.0","sdk/v0.3.0","api/v1.2.0","api/v1.1.1","sdk/v0.2.1","api/v1.0.4","sdk/v0.1.13","api/v1.0.3","sdk/v0.1.12","sdk/v0.1.11","sdk/v0.1.10","api/v1.0.2","sdk/v0.1.9","api/v1.0.1","sdk/v0.1.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55774.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"}]}