Detections
Analytics
Amazon Linux 2 : awscli (ALAS-2026-3966)
medium Nessus Plugin ID 365249
Language:
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of awscli installed on the remote host is prior to 1.18.147-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3966 advisory.Overly permissive file permissions in AWS CLI before 1.44.78 (v1) and 2.34.29 (v2) on Unix-like systems where the umask has not been configured to restrict file permissions (the default on most systems) may allow other local users on the same host to read credentials written by certain CLI subcommands (aws codeartifact login, aws iam create-virtual-mfa-device, aws deploy register).
To remediate this issue, users should upgrade to AWS CLI 1.44.78 (v1) or 2.34.29 (v2) or later.
(CVE-2026-13769)
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. (CVE-2026-18654)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update awscli' or or 'yum update --advisory ALAS2-2026-3966' to update your system.See Also
https://alas.aws.amazon.com//AL2/ALAS2-2026-3966.html
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: Medium
ID: 365249
File Name: al2_ALAS-2026-3966.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 10/12/2026
Updated: 10/12/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.3
Percentile: 50.57
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N
CVSS Score Source: CVE-2026-18654
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.9
Threat Score: 2.4
Threat Vector: CVSS:4.0/E:U
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
Vulnerability Information
CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:awscli
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 10/12/2026
Vulnerability Publication Date: 7/1/2026
Reference Information
CVE: CVE-2026-13769, CVE-2026-18654