CVE-2026-24734
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
Improper input validation vulnerability in Apache Tomcat Native and Apache Tomcat when using an OCSP responder. The lack of complete verification and freshness checks on OCSP responses allows certificate revocation to be bypassed.
Risk Assessment
An attacker could exploit this vulnerability to use a revoked certificate, leading to trust compromise and potential TLS communication takeover.
Recommendation
Upgrade Apache Tomcat Native to version 1.3.5 or later or 2.0.12 or later, and Apache Tomcat to version 11.0.18, 10.1.52, or 9.0.115 or later.
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Original NVD description (English source)
Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.