{"cve":"CVE-2026-18654","nvd":{"published":"2026-08-03T20:17:17.383","modified":"2026-10-23T21:10:00.157","status":"Analyzed","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.\n\n\n\nTo 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_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","score":6.8},"cwes":["CWE-322"],"references":["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"],"products":["amazon:aws_command_line_interface"],"source":"nvd","synced_at":"2026-10-24T16:53:34.184483516+00:00"},"epss":{"cve":"CVE-2026-18654","score":0.00462,"percentile":0.39818,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-hqvf-45jj-mccq","url":"https://osv.dev/vulnerability/GHSA-hqvf-45jj-mccq","summary":"AWS CLI: Disabled SSH host key verification in Amazon AWS CLI EMR helper commands","modified":"2026-09-10T03:50:53.787289287Z","packages":[{"ecosystem":"PyPI","name":"awscli","purl":"pkg:pypi/awscli","ranges":["<1.45.28"],"fixed":["1.45.28"]}]},{"id":"PYSEC-2026-3627","url":"https://osv.dev/vulnerability/PYSEC-2026-3627","summary":"AWS CLI: Disabled SSH host key verification in Amazon AWS CLI EMR helper commands","modified":"2026-08-10T11:30:13.188254623Z","packages":[{"ecosystem":"PyPI","name":"awscli","purl":"pkg:pypi/awscli","ranges":["<1.45.28"],"fixed":["1.45.28"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}