CVE-2026-40264— OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation
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I. Basic Information for CVE-2026-40264
Vulnerability Information
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Vulnerability Title
OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1259
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenBao 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBao是OpenBao开源的一个敏感数据管理软件。 OpenBao 2.5.3之前版本存在安全漏洞，该漏洞源于命名空间多租户分离问题，可能导致泄露令牌访问器的租户被其他租户的特权管理员撤销或续订令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40264
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Same Patch Batch · openbao · 2026-04-21 · 4 CVEs total
| CVE-2026-39396 | 3.1 LOW | OpenBao has Decompression Bomb via Unbounded Copy in OCI Plugin Extraction (DoS) |
| CVE-2026-39388 | OpenBao's Certificate Authentication Allows Token Renewal With Different Certificate | |
| CVE-2026-39946 | OpenBao allows SQL Injection in PostgreSQL database secrets engine |
IV. Related Vulnerabilities
Same product: openbao
- CVE-2026-39396
OpenBao has Decompression Bomb via Unbounded Copy in OCI Plu - CVE-2026-39388
OpenBao's Certificate Authentication Allows Token Renewal Wi - CVE-2026-39946
OpenBao allows SQL Injection in PostgreSQL database secrets - CVE-2026-33758
OpenBao has Reflected XSS in its OIDC authentication error m - CVE-2026-33757
OpenBao lacks user confirmation for OIDC direct callback mod
Same vendor: openbao
- CVE-2026-39396
OpenBao has Decompression Bomb via Unbounded Copy in OCI Plu - CVE-2026-39388
OpenBao's Certificate Authentication Allows Token Renewal Wi - CVE-2026-39946
OpenBao allows SQL Injection in PostgreSQL database secrets - CVE-2026-33758
OpenBao has Reflected XSS in its OIDC authentication error m - CVE-2026-33757
OpenBao lacks user confirmation for OIDC direct callback mod
V. Comments for CVE-2026-40264
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