CVE-2026-55955: Improper Authentication

June 29, 2026 (updated July 10, 2026)

Improper Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.18, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.

Users are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.

References

lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106
nvd.nist.gov/vuln/detail/CVE-2026-55955

Code Behaviors & Features

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