CVE-2026-66422
Received
Received - Intake
Improper Authorization in Apache Tomcat Due to Role Alias Misuse
Vulnerability report for CVE-2026-66422, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-08-25
Last updated on: 2026-08-25
Assigner: Apache Software Foundation
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apache | tomcat | From 11.0.0-m1 (inc) to 11.0.24 (inc) |
| apache | tomcat | From 10.1.0-m1 (inc) to 10.1.57 (inc) |
| apache | tomcat | From 9.0.25 (inc) to 9.0.120 (inc) |
| apache | tomcat | From 8.5.46 (inc) to 8.5.100 (inc) |
| apache | tomcat | From 7.0.97 (inc) to 7.0.109 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-285 | The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. |
