CVE-2026-55957 — Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

Description (CNA)

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 (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Tomcat	affected 11.0.0-M1 through 11.0.4; affected 10.1.0-M1 through 10.1.36; affected 9.0.0.M1 through 9.0.100; affected 8.5.0 through 8.5.100; affected 7.0.0 through 7.0.109; unknown 0 before 7.0.0

CWE

CWE-304

References

https://lists.apache.org/thread/7fk339o5jvd4mcgsf0chbrn4o525ccjh

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/06/29/26

CISA-ADP

No English description supplied.

No references supplied.