CVE-2026-55956

Summary

Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected.

Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix 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 Tomcat9.0.0.M1 <= 9.0.118affected
Apache Software FoundationApache Tomcat8.5.0 <= 8.5.100affected
Apache Software FoundationApache Tomcat7.0.0 <= 7.0.109affected
Apache Software FoundationApache Tomcat0 < 7.0.0unknown

Weaknesses

  • CWE-285: CWE-285 Improper Authorization

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References