CVE-2026-55276
Published:June 29, 2026
Updated:August 04, 2026
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected.
Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.0-M1 <11.0.23Fix Suggestion:
Update to version 11.0.23https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.0-M1 <10.1.56Fix Suggestion:
Update to version 10.1.56https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.0-M1 <9.0.119Fix Suggestion:
Update to version 9.0.119org.apache.tomcat:tomcat-util-scan (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.23Fix Suggestion:
Update to version 11.0.23org.apache.tomcat:tomcat-util-scan (JAVA):
Affected version(s) >=9.0.0.M1 <9.0.119Fix Suggestion:
Update to version 9.0.119org.apache.tomcat:tomcat-util-scan (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.56Fix Suggestion:
Update to version 10.1.56Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Always-Incorrect Control Flow Implementation
EPSS
Base Score:
0.54