CVE-2026-55955

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Apache Software FoundationApache Tomcat11.0.0-M1 <= 11.0.22affected
Apache Software FoundationApache Tomcat10.1.0-M1 <= 10.1.55affected
Apache Software FoundationApache Tomcat9.0.13 <= 9.0.118affected
Apache Software FoundationApache Tomcat8.5.38 <= 8.5.100affected
Apache Software FoundationApache Tomcat7.0.100 <= 7.0.109affected

Weaknesses

  • CWE-287: CWE-287 Improper Authentication

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References