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CVE-2026-18654

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bcec78b23c150125247bf14cf49a961169c6727299416811c7240d7ec8288b2b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"aws-cli","vendor":"AWS","versions":[{"lessThanOrEqual":"1.45.27","status":"affected","version":"0","versionType":"custom"},{"lessThanOrEqual":"2.35.2","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-322","description":"CWE-322 Key exchange without entity authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["vendor-advisory"],"url":"https://aws.amazon.com/security/security-bulletins/2026-071-aws/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/references/2
{"tags":["patch","release-notes"],"url":"https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/references/0
{"tags":["patch","release-notes"],"url":"https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/references/1
{"tags":["release-notes"],"url":"https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6e0af8dab507833fedee40d1c72496dc8f2afa4c03e653a342e67a1d1b97d984 · sha256:2fd2d526c22a3b52… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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