High severityGHSA Advisory· Published May 28, 2026· Updated May 28, 2026
OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL
CVE-2026-45808
Description
# Impact
OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked or renewed by a user in another tenant via the legacy, undocumented sys/revoke and sys/renew endpoints.
# Patch
This will be addressed in v2.5.4.
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 | < 2.5.4 | 2.5.4 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-v8v8-cm84-m686ghsaADVISORY
- github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5cghsaWEB
- github.com/openbao/openbao/pull/3152ghsaWEB
- github.com/openbao/openbao/releases/tag/v2.5.4ghsaWEB
- github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686ghsaWEB
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