Protection mechanism failure in Apache Tomcat - CVE-2026-24733

Vulnerability identifier: #VU122997

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-24733

CWE-ID: CWE-693

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures when handling HTTP/0.9 requests. If the server is configured to allow HEAD requests to a URI but deny GET requests, an attacker can bypass that constraint on GET requests by sending a (specification invalid) HEAD request.

Apache Tomcat
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
Web and Scripting Module
openSUSE Leap
openEuler
Storage Defender Copy Data Management
DevOps
CICS Transaction Gateway for Multiplatforms
CICS Transaction Gateway Desktop Edition
IBM Watson Discovery for IBM Cloud Pak for Data
IBM UrbanCode Release
IBM Power Hardware Management Console (HMC)
IBM Qradar SIEM
tomcat-lib
tomcat-docs-webapp
tomcat-el-3_0-api
tomcat-servlet-4_0-api
tomcat-admin-webapps
tomcat-jsp-2_3-api
tomcat-webapps
tomcat
tomcat-javadoc
tomcat-jsvc
tomcat-help
tomcat-embed
tomcat10-lib
tomcat10-docs-webapp
tomcat10-jsvc
tomcat10-jsp-3_1-api
tomcat10-el-5_0-api
tomcat10-embed
tomcat10-webapps
tomcat10-doc
tomcat10
tomcat10-servlet-6_0-api
tomcat10-admin-webapps
tomcat11-embed
tomcat11-docs-webapp
tomcat11-admin-webapps
tomcat11
tomcat11-el-6_0-api
tomcat11-webapps
tomcat11-jsp-4_0-api
tomcat11-lib
tomcat11-jsvc
tomcat11-doc
tomcat11-servlet-6_1-api

Install updates from vendor's website.

Apache Tomcat - addressed in versions 9.0.113, 10.1.50, 11.0.15
Storage Defender Copy Data Management - update to 2.3.0.1
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.2
DevOps - update to 7.0.0.7
IBM Qradar SIEM - update to 7.5.0 Update Pack 16
tomcat-lib - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-docs-webapp - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-el-3_0-api - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-servlet-4_0-api - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-admin-webapps - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-jsp-2_3-api - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-webapps - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-javadoc - addressed in versions 9.0.36-3.156.1, 9.0.115-150200.102.1
tomcat-jsvc - update to 9.0.115-1
tomcat-help - update to 9.0.115-1
tomcat - update to 9.0.115-1
tomcat-jsvc - update to 9.0.115-150200.102.1
tomcat-embed - update to 9.0.115-150200.102.1
tomcat10-lib - update to 10.1.52-150200.5.61.1
tomcat10-docs-webapp - update to 10.1.52-150200.5.61.1
tomcat10-jsvc - update to 10.1.52-150200.5.61.1
tomcat10-jsp-3_1-api - update to 10.1.52-150200.5.61.1
tomcat10-el-5_0-api - update to 10.1.52-150200.5.61.1
tomcat10-embed - update to 10.1.52-150200.5.61.1
tomcat10-webapps - update to 10.1.52-150200.5.61.1
tomcat10-doc - update to 10.1.52-150200.5.61.1
tomcat10 - update to 10.1.52-150200.5.61.1
tomcat10-servlet-6_0-api - update to 10.1.52-150200.5.61.1
tomcat10-admin-webapps - update to 10.1.52-150200.5.61.1
IBM Power Hardware Management Console (HMC) - addressed in versions 10.3.1063.2, 11.1.1111.5
tomcat11-embed - update to 11.0.18-150600.13.15.1
tomcat11-docs-webapp - update to 11.0.18-150600.13.15.1
tomcat11-admin-webapps - update to 11.0.18-150600.13.15.1
tomcat11 - update to 11.0.18-150600.13.15.1
tomcat11-el-6_0-api - update to 11.0.18-150600.13.15.1
tomcat11-webapps - update to 11.0.18-150600.13.15.1
tomcat11-jsp-4_0-api - update to 11.0.18-150600.13.15.1
tomcat11-lib - update to 11.0.18-150600.13.15.1
tomcat11-jsvc - update to 11.0.18-150600.13.15.1
tomcat11-doc - update to 11.0.18-150600.13.15.1
tomcat11-servlet-6_1-api - update to 11.0.18-150600.13.15.1

• https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.50
• https://github.com/apache/tomcat/commit/711b465cf22684a1acf0cb43501cdbbce9b6c5f4
• https://github.com/apache/tomcat/commit/6c73d74ff281260d74c836370ff6b82f1da8048b
• https://github.com/apache/tomcat/commit/2e2fa23f2635bbb819759576a2f2f5e64ecf7c5f
• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.113
• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.15
• https://lists.apache.org/thread/y5zdwotqzxompqf7133gr43nmk05n142

• Multiple vulnerabilities in Apache Tomcat
• SUSE update for tomcat11
• SUSE update for tomcat10
• SUSE update for tomcat
• SUSE update for tomcat
• openEuler update for tomcat
• Multiple vulnerabilities in IBM Power Hardware Management Console (HMC)
• Multiple vulnerabilities in IBM DevOps Release
• Multiple vulnerabilities in IBM Watson Discovery Cartridge
• Multiple vulnerabilities in IBM Storage Defender Copy Data Management
• Multiple vulnerabilities in IBM CICS Transaction Gateway for Multiplatforms
• Multiple vulnerabilities in CICS Transaction Gateway Desktop Edition
• Multiple vulnerabilities in IBM QRadar SIEM