Improper access control in OpenBao - CVE-2026-46405
Published: May 21, 2026
Vulnerability identifier: #VU132077
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-46405
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenBao
Affected software:
OpenBao
OpenBao
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper access control in the Kerberos auth method GET handler when handling GET requests or requests with an Authorization: Negotiate header. A remote attacker can send a specially crafted request to cause a denial of service.
The issue creates authentication tokens that are not accessible to the caller and can accumulate in storage.
How to mitigate CVE-2026-46405
Install security update from vendor's website.