PT-2026-20874 · Maven · Org.Apache.Tomcat.Embed:Tomcat-Embed-Core+2

Published 2026-02-17 · Updated 2026-02-17

OSV

CVSS v4.0

2.7

Low

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

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.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

GHSA-QQ5R-98HH-RXC9

Affected Products

Org.Apache.Tomcat.Embed:Tomcat-Embed-Core

Org.Apache.Tomcat:Tomcat

Org.Apache.Tomcat:Tomcat-Catalina

References · 10

• https://osv.dev/vulnerability/GHSA-qq5r-98hh-rxc9 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-24733 · Security Note
• https://github.com/apache/tomcat · Note
• https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f · Note
• https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b · Note
• https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4 · Note
• https://tomcat.apache.org/security-9.html · Note
• https://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f · Note
• https://tomcat.apache.org/security-11.html · Note
• https://tomcat.apache.org/security-10.html · Note