CVE-2026-55956

Apache Tomcat: Security constraints for default servlet ignored method

State: Published
Severity: 6.5 Medium
Published: Jun 29, 2026
Updated: Jun 30, 2026
Reserved: Jun 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-285 Improper Authorization

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.0-M1 through 11.0.22Affected 10.1.0-M1 through 10.1.55Affected 9.0.0.M1 through 9.0.118Affected 8.5.0 through 8.5.100Affected 7.0.0 through 7.0.109Affected before 7.0.0Unknown

References

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