Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-4016
Advisory Released Date: 2026-10-24
Advisory Updated Date: 2026-10-26
Severity:
Important
Issue Overview:
Race condition within a thread vulnerability in Apache Tomcat Native allowed client certificate verification requirements to be down-graded for some configurations.
This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Unsupported versions may also be affected.
Users are recommended to upgrade to version 2.0.16 or 1.3.9, which fixes the issue. (CVE-2026-86247)
Affected Packages:
tomcat-native
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update tomcat-native or yum update --advisory ALAS2-2026-4016 to update your system.
New Packages:
aarch64:
tomcat-native-1.2.38-2.amzn2.aarch64
tomcat-native-debuginfo-1.2.38-2.amzn2.aarch64
i686:
tomcat-native-1.2.38-2.amzn2.i686
tomcat-native-debuginfo-1.2.38-2.amzn2.i686
src:
tomcat-native-1.2.38-2.amzn2.src
x86_64:
tomcat-native-1.2.38-2.amzn2.x86_64
tomcat-native-debuginfo-1.2.38-2.amzn2.x86_64