{"cve":"CVE-2026-55774","nvd":{"published":"2026-09-15T16:17:15.923","modified":"2026-09-25T14:23:59.847","status":"Awaiting Analysis","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.","cvss_v4":{"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","score":2.1},"cvss_v3":null,"cwes":["CWE-863"],"references":["https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540","https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37","https://github.com/openbao/openbao/pull/3307","https://github.com/openbao/openbao/pull/3310","https://github.com/openbao/openbao/releases/tag/v2.5.5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-55774","score":0.00562,"percentile":0.46739,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-c36x-h252-g9x2","url":"https://osv.dev/vulnerability/GHSA-c36x-h252-g9x2","summary":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808","modified":"2026-09-25T14:25:35.312159194Z","packages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":[">=0.1.0 <=2.5.4"],"fixed":[]},{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":["<0.0.0-20260617103932-b20b999dd404"],"fixed":["0.0.0-20260617103932-b20b999dd404"]}]},{"id":"GO-2026-5304","url":"https://osv.dev/vulnerability/GO-2026-5304","summary":"OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808 in github.com/openbao/openbao","modified":"2026-09-25T14:25:35.312159194Z","packages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":["<0.0.0-20260617103932-b20b999dd404",">=0.1.0"],"fixed":["0.0.0-20260617103932-b20b999dd404"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}