CVE-2026-40264: Openbao

Low severity, CVSS 2.7. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.

Affected products

• Openbao Openbao: before 2.5.3 (fixed in 2.5.3)

Published 2026-04-21. Last modified 2026-06-17.