low2.1
CVE-2026-55774
OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/openbao/openbao | >= 0.1.0, <= 2.5.4 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c36x-h252-g9x2
- 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/openbao/openbao/commit/9ba1413d793223cca67db12434093a2f25fdc540
- https://github.com/openbao/openbao/pull/3310
- https://github.com/openbao/openbao/releases/tag/v2.6.0