CVE-2026-24734

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Tomcat Native1.1.23 <= 1.1.34affected
Apache Software FoundationApache Tomcat Native1.2.0 <= 1.2.39affected
Apache Software FoundationApache Tomcat Native1.3.0 <= 1.3.4affected
Apache Software FoundationApache Tomcat Native2.0.0 <= 2.0.11affected
Apache Software FoundationApache Tomcat11.0.0-M1 <= 11.0.17affected
Apache Software FoundationApache Tomcat10.1.0-M7 <= 10.1.51affected
Apache Software FoundationApache Tomcat9.0.83 <= 9.0.114affected
Apache Software FoundationApache Tomcat0 <= 8.5.100unaffected

Weaknesses

  • CWE-20: CWE-20 Improper Input Validation

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

tomcat: Apache Tomcat: Certificate revocation bypass due to improper OCSP response validation

Additional References

References