What’s Vulnerable › Vulnerabilities
CVE-2026-40264: OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation
- Severity: low (CVSS 2.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-21 · updated 2026-06-17
- Weakness: CWE-1259
Description
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: before 2.5.3 — fixed in 2.5.3
How to fix
Upgrade to a fixed version: openbao 2.5.3. Check the vendor advisory for mitigations.
References
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