Incorrect authorization in OpenBao - CVE-2026-45808
Published: May 21, 2026
Vulnerability identifier: #VU132078
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45808
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to incorrect authorization in the legacy sys/revoke and sys/renew endpoints when handling cross-namespace lease revocation or renewal requests. A remote privileged user can submit a lease identifier from another tenant to cause a denial of service.
Exploitation requires that a tenant intentionally leak a lease identifier.
Affected software
OpenBao
Fedora
openbao
Fedora
openbao
How to mitigate CVE-2026-45808
Install security update from vendor's website.
OpenBao - update to 2.5.4
openbao - addressed in versions 2.5.4-1.el8, 2.5.4-1.el9, 2.5.4-1.el10_2, 2.5.4-1.el10_3, 2.5.4-1.fc42, 2.5.4-1.fc43
openbao - addressed in versions 2.5.4-1.el8, 2.5.4-1.el9, 2.5.4-1.el10_2, 2.5.4-1.el10_3, 2.5.4-1.fc42, 2.5.4-1.fc43