Improper Input Validation Affecting tomcat-lib package, versions <1:9.0.117-1.el9_8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.51% (43rd percentile)

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  • Snyk IDSNYK-RHEL9-TOMCATLIB-20138673
  • published25 Sept 2026
  • disclosed17 Feb 2026

Introduced: 17 Feb 2026

CVE-2026-24733  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:9 tomcat-lib to version 1:9.0.117-1.el9_8 or higher.
This issue was patched in RHSA-2026:26323.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat-lib package and not the tomcat-lib package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Improper Input Validation vulnerability in Apache Tomcat.

Tomcat did not limit HTTP/0.9 requests to the GET method. If a security constraint was configured to allow HEAD requests to a URI but deny GET requests, the user could bypass that constraint on GET requests by sending a (specification invalid) HEAD request using HTTP/0.9.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.14, from 10.1.0-M1 through 10.1.49, from 9.0.0.M1 through 9.0.112.

Older, EOL versions are also affected.

Users are recommended to upgrade to version 11.0.15 or later, 10.1.50 or later or 9.0.113 or later, which fixes the issue.

CVSS Base Scores

version 3.1