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CVE-2026-45808

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

HIGH

7.1

CVSS Score

Published: August 7, 2026 at 09:15 PM UTC

Updated: September 9, 2026 at 09:17 PM UTC

1 product affected across 1 vendorOpenbao

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Severity

HIGH7.1

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

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

Openbao · Openbao

60%

v < 2.5.4

Affected range stops below 2.5.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_CONFIRM

Source: cverecord

https://github.com/openbao/openbao/security/advisories/GHSA-v8v8-cm84-m686

x_refsource_MISC

Source: cverecord

https://github.com/openbao/openbao/pull/3152

x_refsource_MISC

Source: cverecord

https://github.com/openbao/openbao/commit/c0495646b41cea0e3f5a1030132e9cf5c2375b5c

x_refsource_MISC

Source: cverecord

https://github.com/openbao/openbao/releases/tag/v2.5.4

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

7.1HIGHGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-863

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