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CVE-2026-40264

OpenBao's Token Store Allows Cross-Namespace Renewal, Revocation

LOW
2.7
CVSS Score
Published: April 21, 2026 at 12:47 AM UTC
Updated: June 17, 2026 at 10:44 AM UTC
1 product affected across 1 vendorOpenbao

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Severity
LOW2.7
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Openbao· Openbao
95%
v < 2.5.3
Affected range stops below 2.5.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

2.7LOW[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-1259

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