CVE-2026-40264 Details
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.
A vulnerability in OpenBao, an open-source identity-based secrets management system, allows for cross-namespace token renewal and revocation. This issue affects versions of OpenBao through 2.5.2. In the multi-tenant environment of OpenBao, a tenant that accidentally exposes token accessors can have their tokens manipulated by a privileged administrator in a different tenant.
Users can upgrade to OpenBao version 2.5.3 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1259 | Improper Restriction of Security Token Assignment | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openbao openbao | < 2.5.3 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 24, 2026 | Initial Analysis | [email protected] |
| Apr 21, 2026 | New CVE Received | [email protected] |