Detections
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Amazon Linux 2 : python, --advisory ALAS2-2026-3845 (ALAS-2026-3845)
high Nessus Plugin ID 331993
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of python installed on the remote host is prior to 2.7.18-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3845 advisory.CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host. (CVE-2026-1502)
The incremental HTML parser (html.parser.HTMLParser) allows for CPUdenial-of-service through repeated unterminated markup declarations whenprocessing uncontrolled data. (CVE-2026-15308)
When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use validate=True to enable stricter processing of base64 data. (CVE-2026-3446)
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 python' or or 'yum update --advisory ALAS2-2026-3845' to update your system.See Also
https://alas.aws.amazon.com//AL2/ALAS2-2026-3845.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-1502.html
Plugin Details
Severity: High
ID: 331993
File Name: al2_ALAS-2026-3845.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 8/4/2026
Updated: 8/4/2026
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5
Percentile: 94.39
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-15308
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.7
Threat Score: 6.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:python-debug, p-cpe:/a:amazon:linux:python-debuginfo, p-cpe:/a:amazon:linux:python-devel, p-cpe:/a:amazon:linux:python-libs, p-cpe:/a:amazon:linux:python-test, p-cpe:/a:amazon:linux:python-tools, p-cpe:/a:amazon:linux:python, p-cpe:/a:amazon:linux:tkinter
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 8/4/2026
Vulnerability Publication Date: 4/10/2026
Reference Information
CVE: CVE-2026-1502, CVE-2026-15308, CVE-2026-3446
IAVA: 2026-A-0360-S, 2026-A-0549