CVE-2026-40264 PUBLISHED

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

Assigner: GitHub_M
Reserved: 10.04.2026 Published: 21.04.2026 Updated: 21.04.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS Score: 2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	None
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	openbao
Product	openbao
Versions	Version < 2.5.3 is affected

References

https://github.com/openbao/openbao/security/advisories/GHSA-p49j-v9wc-wg57

Problem Types

CWE-1259: Improper Restriction of Security Token Assignment CWE