Home/CVE/OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation
CVE

CVE-2026-40264

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation

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.

LOW · CVSS 2.7 EPSS 0.0005
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1259Improper Restriction of Security Token Assignment
▤

Affected Products & Versions

1
openbao< 2.5.3
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/openbao/openbao LOW fixed in 0.0.0-20260420162526-f58111d2ca54
▣

Scoring & Timeline

2.7
LOW · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Apr 2026 · 01:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
suse-csafopenSUSE-SU-2026:10594-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57Vendor Advisory
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