Medium severity6.8NVD Advisory· Published Aug 3, 2026· Updated Oct 23, 2026
CVE-2026-18654
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 packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
awscliPyPI | < 1.45.28 | 1.45.28 |
Affected products
3- cpe:2.3:a:amazon:aws_command_line_interface:*:*:*:*:*:*:*:*Range: <1.45.28
Patches
Vulnerability mechanics
References
7- aws.amazon.com/security/security-bulletins/2026-071-aws/nvdVendor Advisory
- github.com/advisories/GHSA-hqvf-45jj-mccqghsaADVISORY
- github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccqnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-18654ghsaADVISORY
- aws.amazon.com/security/security-bulletins/2026-071-awsghsaWEB
- github.com/aws/aws-cli/blob/develop/CHANGELOG.rstnvdRelease NotesWEB
- github.com/aws/aws-cli/blob/v2/CHANGELOG.rstnvdRelease NotesWEB
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