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High severity7.5NVD Advisory· Published Feb 17, 2026· Updated Jul 15, 2026

CVE-2026-24734

CVE-2026-24734

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.apache.tomcat:tomcat-coyoteMaven
>= 11.0.0-M1, < 11.0.1811.0.18
org.apache.tomcat:tomcat-coyoteMaven
>= 10.1.0-M7, < 10.1.5210.1.52
org.apache.tomcat:tomcat-coyoteMaven
>= 9.0.83, < 9.0.1159.0.115
org.apache.tomcat.embed:tomcat-embed-coreMaven
>= 11.0.0-M1, < 11.0.1811.0.18
org.apache.tomcat.embed:tomcat-embed-coreMaven
>= 10.1.0-M7, < 10.1.5210.1.52
org.apache.tomcat.embed:tomcat-embed-coreMaven
>= 9.0.83, < 9.0.1159.0.115

Affected products

112

Patches

Vulnerability mechanics

References

13

News mentions

1