CVE-2026-18654

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-071-aws/
https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst
https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst
https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-03 20:17

Updated : 2026-08-04 20:16

NVD link : CVE-2026-18654

Mitre link : CVE-2026-18654

CVE.ORG link : CVE-2026-18654

JSON object : View

Products Affected

No product.

CWE

CWE-322

Key Exchange without Entity Authentication

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