{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18654", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-08-03T13:07:41.422Z", "datePublished": "2026-08-03T19:38:51.922Z", "dateUpdated": "2026-08-03T19:40:20.867Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-08-03T19:40:20.867Z"}, "title": "Disabled SSH host key verification in Amazon AWS CLI EMR helper commands", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-322", "description": "CWE-322 Key exchange without entity authentication", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-94", "descriptions": [{"lang": "en", "value": "CAPEC-94 Adversary in the Middle (AiTM)"}]}], "affected": [{"vendor": "AWS", "product": "aws-cli", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "1.45.27", "versionType": "custom"}, {"status": "affected", "version": "0", "lessThanOrEqual": "2.35.2", "versionType": "custom"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:aws:aws-cli:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndIncluding": "1.45.27"}, {"vulnerable": true, "criteria": "cpe:2.3:a:aws:aws-cli:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndIncluding": "2.35.2"}]}]}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p><p>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.</p>"}]}], "references": [{"url": "https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst", "tags": ["patch", "release-notes"]}, {"url": "https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst", "tags": ["patch", "release-notes"]}, {"url": "https://aws.amazon.com/security/security-bulletins/2026-071-aws/", "tags": ["vendor-advisory"]}, {"url": "https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.9, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 6.8, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"}}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

{}

{}

{}

{}