OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-55774US | —OT elevated | — | ||
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… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540WEB
- https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37WEB
- https://github.com/openbao/openbao/pull/3307WEB
- https://github.com/openbao/openbao/pull/3310WEB
- https://github.com/openbao/openbao/releases/tag/v2.5.5WEB
- https://github.com/openbao/openbao/releases/tag/v2.6.0WEB
- https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-55774WEB
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