ALAS2023-2026-3420

References: CVE-2026-101296  CVE-2026-101356  CVE-2026-74048  CVE-2026-74049  CVE-2026-88041  CVE-2026-93446 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A missing critical step in authentication vulnerability in Apache Tomcat when the JNDI realm was configured with with a non GSSAPI SASL authentication mechanism allowed attackers to authenticate without providing the correct password.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.26, from 10.1.0-M1 through 10.1.60, from 9.0.0.M1 through 9.0.122.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue. (CVE-2026-101296)

Incorrect object recycling and re-use vulnerability in Apache Tomcat affecting HTTP/2 processing of asynchronous servlets can trigger request and/or response mix-up between users.

This issue affects Apache Tomcat: from 11.0.22 through 11.0.26, from 10.1.55 through 10.1.60, from 9.0.118 through 9.0.122.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fixes the issue. (CVE-2026-101356)

Not Failing Securely ('Failing Open') vulnerability in Apache Tomcat. If the OpenSSLLifecycleListener is configured to use FIPS mode but FIPS activation fails, Tomcat logs and error but continues to use JSSE in non-FIPS mode with the provided configuration.

This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.26, from 10.1.22 through 10.1.60, from 9.0.92 through 9.0.122.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue. (CVE-2026-74048)

Execution After Redirect (EAR) vulnerability in Apache Tomcat.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.26, from 10.1.0-M1 through 10.1.60, from 9.0.0.M1 through 9.0.122.

The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.27, 10.1.61, 9.0.123, which fixes the issue. (CVE-2026-74049)

Incomplete cleanup vulnerability in Apache Tomcat allowed an trailer information from a previous request to leak into a subsequent request.

This issue affects Apache Tomcat: from 11.0.0-M23 through 11.0.26, from 10.1.27 through 10.1.60, from 9.0.92 through 9.0.122.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue. (CVE-2026-88041)

Incomplete cleanup vulnerability in Apache Tomcat could cause TLS 1.3 connections to fail intermittently.

This issue affects Apache Tomcat: from 11.0.0-M21 through 11.0.26, from 10.1.25 through 10.1.60, from 9.0.90 through 9.0.122.

Users are recommended to upgrade to version 11.0.27, 10.1.61 or 9.0.123, which fix the issue. (CVE-2026-93446)

Issue Correction:
Run dnf update tomcat10 --releasever 2023.12.20261112 or dnf update --advisory ALAS2023-2026-3420 --releasever 2023.12.20261112 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

noarch:
    tomcat10-webapps-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-docs-webapp-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-servlet-6.0-api-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-admin-webapps-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-jsp-3.1-api-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-el-5.0-api-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-10.1.61-1.amzn2023.0.1.noarch
    tomcat10-lib-10.1.61-1.amzn2023.0.1.noarch

src:
    tomcat10-10.1.61-1.amzn2023.0.1.src