Improper Authentication in Apache Tomcat - CVE-2026-68569
Published: August 26, 2026
Vulnerability identifier: #VU145386
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68569
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass authentication.
The vulnerability exists due to improper authentication in DataSourceRealm and JDBCRealm when processing principal lookups for certain authentication methods. A remote user can authenticate with CLIENT-CERT or SPNEGO even if the user does not exist in the configured realm to bypass authentication.
The issue affects some authentication methods, including CLIENT-CERT and SPNEGO.
Affected software
Apache Tomcat
How to mitigate CVE-2026-68569
Install security update from vendor's website.
Apache Tomcat - addressed in versions 9.0.121, 10.1.59, 11.0.25