Resource exhaustion in Apache Tomcat - CVE-2025-53506

Vulnerability identifier: #VU112276

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-53506

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when handling excessive HTTP/2 streams. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Apache Tomcat
Debian Linux
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Manager Server 4.3
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Manager Server
SUSE Enterprise Storage
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Web and Scripting Module
openSUSE Leap
openEuler
Oracle Solaris
Netcool Operations Insight
IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data
IBM Watson Discovery for IBM Cloud Pak for Data
Crowd Data Center
Jira Service Management Server
Jira Service Management Data Center
Bitbucket Data Center
Bamboo Server
Jira Software Data Center
IBM Power Hardware Management Console (HMC)
Traffix SDC
Cloudera Data Platform Private Cloud Base for IBM
IBM Qradar SIEM
Jira Software Server
IBM Business Automation Manager Open Editions
IBM Engineering Requirements Management DOORS Next
CICS Transaction Gateway Desktop Edition
CICS Transaction Gateway for Multiplatforms
Integration Bus for z/OS
ApplinX
Storage Protect Plus Server
webMethods BPM
Bitbucket Server
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
tomcat-lib
tomcat-javadoc
tomcat-webapps
tomcat-admin-webapps
tomcat-servlet-4_0-api
tomcat-docs-webapp
tomcat-el-3_0-api
tomcat-jsp-2_3-api
tomcat
tomcat-jsp-2.3-api
tomcat-el-3.0-api
tomcat-servlet-4.0-api
tomcat (Red Hat package)
tomcat9 (Red Hat package)
tomcat-help
tomcat-jsvc
tomcat-doc
tomcat-embed
tomcat10-servlet-6_0-api
tomcat10-webapps
tomcat10-jsvc
tomcat10-docs-webapp
tomcat10-el-5_0-api
tomcat10-lib
tomcat10-embed
tomcat10-jsp-3_1-api
tomcat10-doc
tomcat10
tomcat10-admin-webapps
tomcat10 (Debian package)
tomcat11-embed
tomcat11-docs-webapp
tomcat11-el-6_0-api
tomcat11-admin-webapps
tomcat11-jsvc
tomcat11-doc
tomcat11-jsp-4_0-api
tomcat11-webapps
tomcat11-servlet-6_1-api
tomcat11
tomcat11-lib
tomcat11 (Debian package)

Install updates from vendor's website.

Apache Tomcat - addressed in versions 9.0.107, 10.1.43, 11.0.9
Netcool Operations Insight - update to 1.6.15
IBM Watson Speech Services Cartridge for IBM Cloud Pak for Data - update to 5.2.2
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.2.1
Crowd Data Center - addressed in versions 5.3.8, 6.0.10, 6.1.6, 6.2.5, 6.3.2
Jira Service Management Server - addressed in versions 5.12.26, 10.3.9, 10.7.3, 11.0.1
Jira Service Management Data Center - addressed in versions 5.12.26, 10.3.9, 10.7.3, 11.0.1
IBM Qradar SIEM - update to 7.5.0 Update Pack 13 IF01
IBM Business Automation Manager Open Editions - update to 8.0.8
Bitbucket Data Center - addressed in versions 8.19.21, 9.4.9, 9.6.5
Bitbucket Server - addressed in versions 8.19.21, 9.4.9, 9.6.5
Bamboo Server - addressed in versions 9.6.16, 10.2.7, 11.0.4
IBM Engineering Requirements Management DOORS Next - update to 9.7.2.11
Jira Software Server - addressed in versions 9.12.26, 10.3.9, 10.7.3, 11.0.1
Jira Software Data Center - addressed in versions 9.12.26, 10.3.9, 10.7.3, 11.0.1
IBM Power Hardware Management Console (HMC) - addressed in versions 10.3.1060.0 SP3, 11.1.1110.0
tomcat-lib - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-javadoc - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-webapps - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-admin-webapps - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-servlet-4_0-api - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-docs-webapp - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-el-3_0-api - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-jsp-2_3-api - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat - addressed in versions 9.0.36-3.148.1, 9.0.108-150200.91.1
tomcat-lib - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-jsp-2.3-api - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-el-3.0-api - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-docs-webapp - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-servlet-4.0-api - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-admin-webapps - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat-webapps - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat - addressed in versions 9.0.87-1, 9.0.107-1, 9.0.115-1
tomcat (Red Hat package) - addressed in versions 9.0.87-1.el8_8.7, 9.0.87-1.el8_10.6, 9.0.87-1.el9_2.6, 9.0.87-3.el9_6.3, 10.1.36-1.el10_0.2
tomcat9 (Red Hat package) - update to 9.0.87-5.el10_0.3
tomcat-help - update to 9.0.100-6
tomcat - update to 9.0.100-6
tomcat-jsvc - update to 9.0.100-6
tomcat-doc - addressed in versions 9.0.107-1, 9.0.115-1
tomcat-jsvc - update to 9.0.108-150200.91.1
tomcat-embed - update to 9.0.108-150200.91.1
Storage Protect Plus Server - update to 10.1.18
tomcat10-servlet-6_0-api - update to 10.1.43-150200.5.48.1
tomcat10-webapps - update to 10.1.43-150200.5.48.1
tomcat10-jsvc - update to 10.1.43-150200.5.48.1
tomcat10-docs-webapp - update to 10.1.43-150200.5.48.1
tomcat10-el-5_0-api - update to 10.1.43-150200.5.48.1
tomcat10-lib - update to 10.1.43-150200.5.48.1
tomcat10-embed - update to 10.1.43-150200.5.48.1
tomcat10-jsp-3_1-api - update to 10.1.43-150200.5.48.1
tomcat10-doc - update to 10.1.43-150200.5.48.1
tomcat10 - update to 10.1.43-150200.5.48.1
tomcat10-admin-webapps - update to 10.1.43-150200.5.48.1
tomcat10 (Debian package) - addressed in versions 10.1.52-1~deb12u1, 10.1.52-1~deb13u1
webMethods BPM - addressed in versions 10.15 Fix 14, 11.1 Fix 2
tomcat11-embed - update to 11.0.9-150600.13.6.1
tomcat11-docs-webapp - update to 11.0.9-150600.13.6.1
tomcat11-el-6_0-api - update to 11.0.9-150600.13.6.1
tomcat11-admin-webapps - update to 11.0.9-150600.13.6.1
tomcat11-jsvc - update to 11.0.9-150600.13.6.1
tomcat11-doc - update to 11.0.9-150600.13.6.1
tomcat11-jsp-4_0-api - update to 11.0.9-150600.13.6.1
tomcat11-webapps - update to 11.0.9-150600.13.6.1
tomcat11-servlet-6_1-api - update to 11.0.9-150600.13.6.1
tomcat11 - update to 11.0.9-150600.13.6.1
tomcat11-lib - update to 11.0.9-150600.13.6.1
tomcat11 (Debian package) - update to 11.0.15-1~deb13u1
Oracle Solaris - update to 11.4 SRU 86

• https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.107
• https://github.com/apache/tomcat/commit/434772930f362145516dd60681134e7f0cf8115b
• https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.43
• https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.9
• https://lists.apache.org/thread/tfjqf1odwql63sb40lqpb7dvlffk15t7
• https://lists.apache.org/thread/cdfmz3l1blkbgpg9jdn9tg9rlv2bzwj5

• Multiple vulnerabilities in Apache Tomcat
• openEuler 24.03 LTS SP2 update for tomcat
• openEuler 24.03 LTS SP1 update for tomcat
• openEuler 24.03 LTS update for tomcat
• openEuler 22.03 LTS SP4 update for tomcat
• openEuler 22.03 LTS SP3 update for tomcat
• openEuler 20.03 LTS SP4 update for tomcat
• SUSE update for tomcat
• Two denial of service vulnerabilities in Traffix SDC Apache Tomcat component
• Multiple vulnerabilities in IBM Business Automation Manager Open Editions
• Anolis OS update for tomcat
• Anolis OS update for tomcat
• Bamboo Data Center and Server update for Apache Tomcat DoS
• Bitbucket Data Center and Server update for Apache Tomcat
• Crowd Data Center update for Apache Tomcat
• Multiple vulnerabilities in IBM Integration Bus for z/OS
• Red Hat Enterprise Linux 8 update for tomcat
• Red Hat Enterprise Linux 10 update for tomcat9
• Red Hat Enterprise Linux 10 update for tomcat
• Red Hat Enterprise Linux 9 update for tomcat
• Red Hat Enterprise Linux 8 update for tomcat
• Red Hat Enterprise Linux 9 update for tomcat
• Anolis OS update for tomcat
• SUSE update for tomcat10
• SUSE update for tomcat11
• Multiple vulnerabilities in IBM QRadar SIEM
• SUSE update for tomcat
• Jira Software Data Center and Server update for Apache Tomcat
• DoS in Jira Service Management Data Center and Server Apache Tomcat component
• Multiple vulnerabilities in IBM Watson Discovery
• Multiple vulnerabilities in IBM ApplinX
• Multiple vulnerabilities in Oracle Solaris
• IBM Watson Speech Services Cartridge update for Apache Tomcat
• Multiple vulnerabilities in IBM webMethods BPM
• Multiple vulnerabilities in IBM Power HMC
• Multiple vulnerabilities in Netcool Operations Insight
• Debian update for tomcat10
• Debian update for tomcat11
• Anolis OS update for tomcat
• Multiple vulnerabilities in IBM Engineering Requirements Management DOORS and DOORS Web Access
• Multiple vulnerabilities in IBM Storage Protect Plus Server
• Multiple vulnerabilities in IBM Cloudera Data Platform Private Cloud Base with IBM (CDP)
• Multiple vulnerabilities in IBM CICS Transaction Gateway for Multiplatforms
• Multiple vulnerabilities in CICS Transaction Gateway Desktop Edition