{"id":"CVE-2026-55774","state":"PUBLISHED","title":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808","description":"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.","publishedAt":"2026-09-15T15:42:03.157Z","updatedAt":"2026-09-15T17:26:45.372Z","severity":{"score":2.1,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["openbao openbao"],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.5","status":"affected"}]}],"references":["https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2","https://github.com/openbao/openbao/pull/3307","https://github.com/openbao/openbao/pull/3310","https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540","https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37","https://github.com/openbao/openbao/releases/tag/v2.5.5","https://github.com/openbao/openbao/releases/tag/v2.6.0"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55774.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55774","state":"PUBLISHED","datePublished":"2026-09-15T15:42:03.157Z","dateUpdated":"2026-09-15T17:26:45.372Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T14:40:28.379Z"},"containers":{"cna":{"title":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.5","status":"affected"}]}],"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2","name":"https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openbao/openbao/pull/3307","name":"https://github.com/openbao/openbao/pull/3307","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/pull/3310","name":"https://github.com/openbao/openbao/pull/3310","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540","name":"https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37","name":"https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/releases/tag/v2.5.5","name":"https://github.com/openbao/openbao/releases/tag/v2.5.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/releases/tag/v2.6.0","name":"https://github.com/openbao/openbao/releases/tag/v2.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":2.1,"baseSeverity":"LOW","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-15T15:42:03.157Z"},"source":{"advisory":"GHSA-c36x-h252-g9x2","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T17:26:36.523521Z","id":"CVE-2026-55774","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-15T17:26:45.372Z"}}]}}}