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Amazon Linux 2023 : python3.12, python3.12-devel, python3.12-idle (ALAS2023-2026-1557)

high Nessus Plugin ID 306229

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1557 advisory.

 The webbrowser.open() API would accept leading dashes in the URL whichcould be handled as command line options for certain web browsers. Newbehavior rejects leading dashes. Users are recommended to sanitize URLsprior to passing to webbrowser.open(). (CVE-2026-4519)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update python3.12 --releasever 2023.11.20260413' or or 'dnf update --advisory ALAS2023-2026-1557 --releasever 2023.11.20260413' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1557.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-4519.html

Plugin Details

Severity: High

ID: 306229

File Name: al2023_ALAS2023-2026-1557.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/13/2026

Updated: 4/13/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.0

CVSS v2

Risk Factor: High

Base Score: 7.3

Temporal Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:P

CVSS Score Source: CVE-2026-4519

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7

Threat Score: 3.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python3.12-idle, p-cpe:/a:amazon:linux:python3.12-debugsource, p-cpe:/a:amazon:linux:python3.12-test, p-cpe:/a:amazon:linux:python3.12-libs, p-cpe:/a:amazon:linux:python3.12-devel, p-cpe:/a:amazon:linux:python3.12-debug, p-cpe:/a:amazon:linux:python3.12-debuginfo, p-cpe:/a:amazon:linux:python3.12-tkinter, p-cpe:/a:amazon:linux:python3.12, cpe:/o:amazon:linux:2023

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 4/13/2026

Vulnerability Publication Date: 3/20/2026

Reference Information

CVE: CVE-2026-4519