Vulnerability details

CVE-2026-45808

openbao openbao

OpenBao's cross-namespace lease revocation via legacy sys/revoke path bypasses ACL

CVSS 4.0

7.1High

Official description

OpenBao is an open source identity-based secrets management system. Prior to version 2.5.4, OpenBao's namespaces provide multi-tenant separation. A tenant who intentionally leaks lease identifiers can have their lease and underlying credential revoked or renewed by a user in another tenant via the legacy, undocumented `sys/revoke` and `sys/renew` endpoints. This is fixed in OpenBao v2.5.4.

CVSS scores

Score	Version	Source	Vector
7.1High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`

Affected products

Vendor	Product	Versions	Source
openbao	openbao	< 2.5.4	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686 x_refsource_CONFIRM
https://github.com/openbao/openbao/pull/3152 x_refsource_MISC
https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c x_refsource_MISC
https://github.com/openbao/openbao/releases/tag/v2.5.4 x_refsource_MISC

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Details

Published: 2026-08-08
Last updated: 2026-08-13
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.42%

Probability of exploitation in 30 days

37.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-863
Incorrect Authorization