REDHAT-BUG-2476511: Medium severity Apache Tomcat vulnerability

Published May 12, 2026
·
Updated

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect

Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Affected Software

5 affected components
Apache Tomcat>=11.0.0-M1<=11.0.21
Apache Tomcat>=10.1.0-M1<=10.1.54
Apache Tomcat>=9.0.0.M1<=9.0.117
Apache Tomcat>=8.5.0<=8.5.100
Apache Tomcat<7.0.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.22
  2. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.55
  3. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.118

Event History

May 12, 2026
Data Sourced
via Red Hat·04:01 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2476511?

The severity of REDHAT-BUG-2476511 is rated as medium (4) on the risk scale.

2

What is the description of REDHAT-BUG-2476511?

REDHAT-BUG-2476511 refers to authentication bypass issues in digest authentication within Apache Tomcat.

3

Which versions of Apache Tomcat are affected by REDHAT-BUG-2476511?

REDHAT-BUG-2476511 affects Apache Tomcat versions from 11.0.0-M1 through 11.0.21, 10.1.0-M1 through 10.1.54, 9.0.0.M1 through 9.0.117, and 8.5.0 through 8.5.100, as well as older unsupported versions.

4

How do I fix REDHAT-BUG-2476511?

To fix REDHAT-BUG-2476511, update Apache Tomcat to a version that is not affected by the vulnerability.

5

What type of vulnerability is REDHAT-BUG-2476511?

REDHAT-BUG-2476511 is categorized as a deprecated authentication bypass issue.

Contact

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