Key Exchange without Entity Authentication Affecting awscli package, versions [,1.45.28)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-AWSCLI-18533156
- published5 Aug 2026
- disclosed3 Aug 2026
- creditAli Sunbul
Introduced: 3 Aug 2026
NewCVE-2026-18654 (opens in a new tab)How to fix?
Upgrade awscli to version 1.45.28 or higher.
Overview
Affected versions of this package are vulnerable to Key Exchange without Entity Authentication due to disabled SSH host key verification in the EMR SSH helper commands. An attacker can intercept SSH sessions and file transfers by performing a man-in-the-middle attack between the client and the EMR cluster endpoint.