CVE-2026-66422
Published:August 25, 2026
Updated:August 29, 2026
Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.25 <9.0.121Fix Suggestion:
Update to version 9.0.121https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.0-M1 <10.1.58Fix Suggestion:
Update to version 10.1.58https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=9.0.26 <9.0.121Fix Suggestion:
Update to version 9.0.121org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.59Fix Suggestion:
Update to version 10.1.59org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=9.0.26 <9.0.121Fix Suggestion:
Update to version 9.0.121org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=11.0.0-M1 <11.0.25Fix Suggestion:
Update to version 11.0.25org.apache.tomcat.embed:tomcat-embed-core (JAVA):
Affected version(s) >=10.1.0-M1 <10.1.59Fix Suggestion:
Update to version 10.1.59Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Authorization
EPSS
Base Score:
0.57