Improper Input Validation Affecting tomcat-lib package, versions <0:7.0.76-10.amzn2.0.16


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.19% (41st percentile)

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  • Snyk IDSNYK-AMZN2-TOMCATLIB-15751630
  • published23 Mar 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 Amazon-Linux:2 tomcat-lib to version 0:7.0.76-10.amzn2.0.16 or higher.
This issue was patched in ALAS2-2026-3204.

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 Amazon-Linux. See How to fix? for Amazon-Linux:2 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