CVE-2026-55957 PUBLISHED

Apache Tomcat: Authentication bypass with JNDIRealm and GSSAPI authenticated bind

Assigner: apache
Reserved: 17.06.2026 Published: 29.06.2026 Updated: 30.06.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache Tomcat
Versions Default: unaffected
  • affected from 11.0.0-M1 to 11.0.4 (incl.)
  • affected from 10.1.0-M1 to 10.1.36 (incl.)
  • affected from 9.0.0.M1 to 9.0.100 (incl.)
  • affected from 8.5.0 to 8.5.100 (incl.)
  • affected from 7.0.0 to 7.0.109 (incl.)
  • unknown from 0 to 7.0.0 (excl.)

Credits

  • Ilan Toyter finder

References

Problem Types

  • CWE-304 Missing Critical Step in Authentication CWE