CVE-2026-18654
Disabled SSH host key verification in Amazon AWS CLI EMR helper commands
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:CScopeChanged
Impact
C:HConfidentialityHigh
I:NIntegrityNone
A:NAvailabilityNone
Weaknesses
Affected Products
AWS
commercial·US
Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
References
https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst
github.com
https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst
github.com
https://aws.amazon.com/security/security-bulletins/2026-071-aws/
aws.amazon.com
and 1 more references View all →
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