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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://aws.amazon.com/security/security-bulletins/2026-071-aws/ Vendor Advisory
- https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq Vendor Advisory
Vendor advisories in the News 1
- CVE-2026-18654 - Disabled SSH host key verification in AWS CLI EMR helper commands AWS Security Bulletins · 2026-10-21
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.9 · amazonNVD modified 2026-10-23 17:38
Affected (CPE criteria) 1
cpe:2.3:a:amazon:aws_command_line_interface:*:*:*:*:*:*:*:*
References 4
- https://aws.amazon.com/security/security-bulletins/2026-071-aws/ Vendor Advisory
- https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst Release Notes
- https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst Release Notes
- https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq Vendor Advisory