Multi-Tenant Namespace Vulnerabilities in OpenBao Secrets Management System
CVE-2026-45808

7.1HIGH

Key Information:

Vendor

Openbao

Status
Openbao
Vendor
CVE Published:
7 August 2026

What is CVE-2026-45808?

OpenBao, an open-source identity-based secrets management system, faces a vulnerability related to its namespace structure, designed for multi-tenant separation. Prior to version 2.5.4, the system's namespaces could be compromised when a tenant intentionally exposed lease identifiers. This exposure enables unauthorized users from different tenants to revoke or renew leases and their underlying credentials using the undocumented sys/revoke and sys/renew endpoints, jeopardizing the integrity of tenant data. The issue has been addressed in version 2.5.4 of OpenBao.

Affected Version(s)

openbao < 2.5.4

References

https://github.com/openbao/openbao/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/openbao/openbao/pull/3152
x_refsource_MISC
https://github.com/openbao/openbao/commit/c0495646b41cea0...
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.