Amazon Linux 2023 : awscli-2 (ALAS2023-2026-3133)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3133 advisory. Overly permissive file permissions in AWS CLI before 1.44.78 v1 and 2.34.29 v2 on Unix-like systems where the umask has not been configured to restrict file permissions the default on most...

CVE-2026-18654

A flaw was found in AWS CLI. This vulnerability, located in the Elastic MapReduce EMR Secure Shell SSH helper commands, involves a lack of entity authentication during key exchange. A remote attacker, positioned between the client and the EMR cluster, could exploit this to intercept SSH sessions...

Linux Distros Unpatched Vulnerability : CVE-2026-18654

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Key exchange without entity authentication in the EMR SSH helper commands in Amazon AWS CLI before 1.45.28 and AWS CLI v2 before 2.35.3 might allow...

AWS CLI: Disabled SSH host key verification in Amazon AWS CLI EMR helper commands

Summary The AWS Command Line Interface AWS CLI is a unified tool to manage AWS services from the command line. An issue exists where the EMR SSH helper commands aws emr ssh, aws emr socks, aws emr put, aws emr get passed StrictHostKeyChecking=no to the underlying SSH client, disabling host key...

CVE-2026-18654

This CVE (CVE-2026-18654) affects the EMR SSH helper commands in the Amazon AWS CLI. The issue is “Key exchange without entity authentication,” enabling potential MITM attackers to intercept SSH sessions and file transfers when connecting to an EMR cluster endpoint. Affected products are AWS CLI ...

CVE-2026-18654 Disabled SSH host key verification in Amazon AWS CLI EMR helper commands

Key exchange without entity authentication in the EMR SSH helper commands in Amazon AWS CLI before 1.45.28 and AWS CLI v2 before 2.35.3 might allow man-in-the-middle attackers to intercept SSHsessions and file transfers via network positioning between the client and the EMR cluster endpoint. To...

PT-2026-67492

Name of the Vulnerable Software and Affected Versions Amazon AWS CLI versions prior to 1.45.28 Amazon AWS CLI v2 versions prior to 2.35.3 Description Key exchange without entity authentication in the EMR SSH helper commands allows man-in-the-middle attackers to intercept SSH sessions and file...

CVE-2026-18654: Key Exchange without Entity Authentication

Key exchange without entity authentication in the EMR SSH helper commands in Amazon AWS CLI before 1.45.28 and AWS CLI v2 before 2.35.3 might allow man-in-the-middle attackers to intercept SSHsessions and file transfers via network positioning between the client and the EMR cluster endpoint. To...