CVE-2026-55957

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 products

Apache Tomcat

Apache Tomcat

< 9.0.101, 10.1.37, 11.0.5

Fix

Available

CVSS 3.1

7.3 HIGH

EPSS

2.9% (86th percentile)

Weakness

CWE-304

NVD status

Analyzed

Published

2026-06-29