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 remediate this issue, users should upgrade to AWS CLI v1 1.45.28 or later, or AWS CLI v2 2.35.3 or later.

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 man-in-the-middle attackers to intercept SSHsessions and file     transfers via network positioning between the client and the EMR cluster endpoint. To remediate this     issue, users should upgrade to AWS CLI v1 1.45.28 or later, or AWS CLI v2 2.35.3 or later.
    (CVE-2026-18654)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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 remediate this
    issue, users should upgrade to AWS CLI v1 1.45.28 or later, or AWS CLI v2 2.35.3 or later.
    (CVE-2026-18654)

ID	Name	Product	Family	Type	Severity
342175	Linux Distros Unpatched Vulnerability : CVE-2026-18654	Nessus	Misc.	Local	medium
445765	SCA: security update for awscli (GHSA-hqvf-45jj-mccq)	Tenable Cloud Security	SCA Checks	Local	medium
445765	SCA: security update for awscli (GHSA-hqvf-45jj-mccq)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-18654

medium

Tenable Plugins

medium

medium

medium