CVE-2026-18654

Published: Aug 3, 2026Modified: Aug 4, 2026

6.9

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5 (Secondary)

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.

Related CWEs

CWE-322

Key Exchange without Entity Authentication

The product performs a key exchange with an actor without verifying the identity of that actor.

References (4)

https://aws.amazon.com/security/security-bulletins/2026-071-aws/

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

https://github.com/aws/aws-cli/blob/develop/CHANGELOG.rst

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

https://github.com/aws/aws-cli/blob/v2/CHANGELOG.rst

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

https://github.com/aws/aws-cli/security/advisories/GHSA-hqvf-45jj-mccq

Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

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