github.com
https://github.com/openbao/openbao CVE-2026-55774
OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
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
Description source: GitHub Advisory
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
github.com/openbao/openbaoBrowse Go / github.com/openbao/openbao | GitHub Advisory | 0.1.0 to ≤ 2.5.4 | affected |
| Before 0.0.0-20260617103932-b20b999dd404 · Fixed in 0.0.0-20260617103932-b20b999dd404 | affected |
References
5github.com
https://github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37 github.com
https://github.com/openbao/openbao/pull/3307 github.com
https://github.com/openbao/openbao/releases/tag/v2.5.5 github.com
https://github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2