CVE-2026-45808: Openbao

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.4, 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. This is fixed in OpenBao v2.5.4.

Affected products

• Openbao Openbao: before 2.5.4 (fixed in 2.5.4)

Published 2026-08-07. Last modified 2026-09-09.