CVE-2026-18654
Disabled SSH host key verification in Amazon AWS CLI EMR helper commands
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-322 |
| Vendor | aws |
| Product | aws-cli |
| Published | Aug 3, 2026 |
| Last Updated | Aug 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
AWS / aws-cli
0 ≤ 1.45.27 0 ≤ 2.35.2