OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
GHSA-c36x-h252-g9x2 · BIT-openbao-2026-55774 · CVE-2026-55774 · GO-2026-5304
Published · Modified
AI SAST
Find this class of vulnerability in your own code
Corgea's AI-native static analysis detects vulnerabilities like this one across your repositories, ranks them by exploitability, and returns review-ready fixes.
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
References
- WEB https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2
- WEB https://github.com/openbao/openbao/pull/3307
- WEB https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37
- PACKAGE https://github.com/openbao/openbao
- WEB https://github.com/openbao/openbao/releases/tag/v2.5.5
Ready to move
Start Securing
Free, no credit card | First findings in minutes