Improper Certificate Validation in Apache Tomcat - CVE-2026-34500
Published: April 9, 2026 / Updated: April 10, 2026
Vulnerability identifier: #VU125744
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-34500
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Apache Foundation
Affected software:
Apache Tomcat
Apache Tomcat
Detailed vulnerability description
The vulnerability allows a remote user to bypass client certificate authentication.
The vulnerability exists due to improper certificate validation in CLIENT_CERT authentication when processing OCSP checks with FFM and soft-fail disabled. A remote user can present a certificate in affected scenarios to bypass client certificate authentication.
Only some scenarios using FFM are affected.
How to mitigate CVE-2026-34500
Install security update from vendor's website.