CVE-2026-66422

Apache Tomcat: Servlet role references can bypass declarative role constraints

State: Published
Severity: 8.1 High
Published: Aug 25, 2026
Updated: Aug 26, 2026
Reserved: Jul 27, 2026

Description

Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	CISA-ADP

Weaknesses

CWE-285 Improper Authorization

Affected Products

Product	Versions
Apache TomcatApache Software Foundation	11.0.0-M1 through 11.0.24Affected 10.1.0-M1 through 10.1.57Affected 9.0.25 through 9.0.120Affected 8.5.46 through 8.5.100Affected 7.0.97 through 7.0.109Affected before 7.0.97Not affected

References

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