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Vulnerabilities CVE-2026-18654

CVE-2026-18654

Medium
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
6.9
EPSS Score
0.29%

21.4th percentile

CVSS 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
Confidence
90%
Published
Aug 3, 2026
Last Modified
Aug 4, 2026
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