CVE-2026-18654
Published:August 03, 2026
Updated:August 06, 2026
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.
Affected Packages
awscli (CONDA):
Affected version(s) >=1.8.3 <1.45.28Fix Suggestion:
Update to version 1.45.28https://github.com/aws/aws-cli.git (GITHUB):
Affected version(s) >=0.4.1 <1.45.28Fix Suggestion:
Update to version 1.45.28awscli (PYTHON):
Affected version(s) >=0.4.1 <1.45.28Fix Suggestion:
Update to version 1.45.28Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Key Exchange without Entity Authentication
EPSS
Base Score:
0.29