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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-hqvf-45jj-mccq AWS CLI: Disabled SSH host key verification in Amazon AWS CLI EMR helper commands
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 04 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 03 Aug 2026 20:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Disabled SSH host key verification in Amazon AWS CLI EMR helper commands
First Time appeared Aws
Aws aws-cli
Weaknesses CWE-322
CPEs cpe:2.3:a:aws:aws-cli:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws aws-cli
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-08-04T19:32:59.576Z

Reserved: 2026-08-03T13:07:41.422Z

Link: CVE-2026-18654

cve-icon Vulnrichment

Updated: 2026-08-04T19:32:44.803Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-03T20:17:17.383

Modified: 2026-08-04T20:16:50.257

Link: CVE-2026-18654

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T10:00:04Z

Weaknesses