openbao/openbao · Security
OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
- GHSA ID
- GHSA-c36x-h252-g9x2
- CVE ID
- CVE-2026-55774
- Severity
- low
- Published
- Updated
- CVSS v4
- 2.1 · 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
Description
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
CWEs
- CWE-863 · Incorrect Authorization
References
- https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2 ↗
- https://github.com/openbao/openbao/pull/3307 ↗
- https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37 ↗
- https://github.com/openbao/openbao/releases/tag/v2.5.5 ↗
- https://github.com/advisories/GHSA-c36x-h252-g9x2 ↗