Unrated severityNVD Advisory· Published Aug 3, 2026· Updated Aug 4, 2026
Disabled SSH host key verification in Amazon AWS CLI EMR helper commands
CVE-2026-18654
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.
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/aws/aws-cli/blob/develop/CHANGELOG.rstmitrepatchrelease-notes
- github.com/aws/aws-cli/blob/v2/CHANGELOG.rstmitrepatchrelease-notes
- aws.amazon.com/security/security-bulletins/2026-071-aws/mitrevendor-advisory
- github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccqmitrerelease-notes
News mentions
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