Improper Certificate Validation in Apache Tomcat - CVE-2026-73581
Published: September 23, 2026
Vulnerability identifier: #VU151849
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-73581
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass certificate revocation checks.
The vulnerability exists due to improper certificate validation in the OpenSSL and OpenSSL-FFM TLS implementations when validating a certificate that uses a keystore. A remote attacker can present a certificate subject to certificate revocation checks to bypass certificate revocation checks.
The issue affects both the OpenSSL and OpenSSL-FFM TLS implementations when the certificate uses a keystore.
Affected software
Apache Tomcat
How to mitigate CVE-2026-73581
Install security update from vendor's website.
Apache Tomcat - addressed in versions 9.0.122, 10.1.60, 11.0.26