CVE-2026-24734NVD

Vulnerability 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.

Severity Level

HIGH(7.5)

Published Date

Feb 17, 2026

Last Modified

Jul 15, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.50%Probability

Root Weakness (CWE)

CWE-20: Improper Input Validation ↗

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required.

CWE-295: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 7.5 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityNone

IntegrityHigh

AvailabilityNone

Affected & Patched Versions

Affected Versions

Apache Tomcat >= 9.0.83 and < 9.0.115
Apache Tomcat >= 10.1.1 and < 10.1.52
Apache Tomcat >= 11.0.1 and < 11.0.18
Apache Tomcat
Apache Tomcat Native >= 1.3.0 and < 1.3.5
Apache Tomcat Native >= 2.0.0 and < 2.0.12

Patched Versions

Apache Tomcat 9.0.115
Apache Tomcat 10.1.52
Apache Tomcat 11.0.18
Apache Tomcat Native 1.3.5
Apache Tomcat Native 2.0.12

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