Low severityNVD Advisory· Published Jun 19, 2026· Updated Jun 19, 2026
OpenBao: Cross-namespace lease revocation/renewal via canonical sys/leases/{revoke,renew} — incomplete fix of CVE-2026-45808
CVE-2026-55774
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/openbao/openbaoGo | >= 0.1.0, <= 2.5.4 | — |
github.com/openbao/openbaoGo | < 0.0.0-20260617103932-b20b999dd404 | 0.0.0-20260617103932-b20b999dd404 |
Affected products
1Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-c36x-h252-g9x2ghsaADVISORY
- github.com/openbao/openbao/commit/b20b999dd4044d7b419a5472d8fe08407828be37ghsaWEB
- github.com/openbao/openbao/pull/3307ghsaWEB
- github.com/openbao/openbao/releases/tag/v2.5.5ghsaWEB
- github.com/openbao/openbao/security/advisories/GHSA-c36x-h252-g9x2ghsaWEB
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