CVE-2026-55957
Published:June 29, 2026
Updated:July 21, 2026
Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109.
Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.
Affected Packages
https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=10.1.0 <10.1.37Fix Suggestion:
Update to version 10.1.37https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=11.0.0 <11.0.5Fix Suggestion:
Update to version 11.0.5https://github.com/apache/tomcat.git (GITHUB):
Affected version(s) >=9.0.0 <9.0.101Fix Suggestion:
Update to version 9.0.101org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=10.1.0 <10.1.37Fix Suggestion:
Update to version 10.1.37org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=11.0.0 <11.0.5Fix Suggestion:
Update to version 11.0.5org.apache.tomcat:tomcat-catalina (JAVA):
Affected version(s) >=9.0.1 <9.0.101Fix Suggestion:
Update to version 9.0.101Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Missing Critical Step in Authentication
EPSS
Base Score:
0.46