OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
### Summary OpenBao 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. ### Impact OpenBao'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. ### Patch This will be fixed in OpenBao v2.5.5. ### References This vulnerability is similar to but distinct from: - CVE-2026-45808 / GHSA-v8v8-cm84-m686 - CVE-2026-40264 / GHSA-p49j-v9wc-wg57
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/openbaoPACKAGE
- https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37WEB
- https://github.com/openbao/openbao/pull/3307WEB
- https://github.com/openbao/openbao/releases/tag/v2.5.5WEB
- https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2WEB
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