Detections
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Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1600)
medium Nessus Plugin ID 311332
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1600 advisory.The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files. sys.audit handlers for this audit event therefore do not fire. (CVE-2026-2297)
The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output(). (CVE-2026-3644)
When an Expat parser with a registered ElementDeclHandler parses an inlinedocument type definition containing a deeply nested content model a C stackoverflow occurs. (CVE-2026-4224)
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 'dnf update python3.13 --releasever 2023.11.20260427' or or 'dnf update --advisory ALAS2023-2026-1600 --releasever 2023.11.20260427' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1600.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-2297.html
Plugin Details
Severity: Medium
ID: 311332
File Name: al2023_ALAS2023-2026-1600.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 4/30/2026
Updated: 4/30/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-3644
CVSS v3
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6
Threat Score: 2.3
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-4224
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:python3.13, p-cpe:/a:amazon:linux:python3.13-tkinter, p-cpe:/a:amazon:linux:python3.13-idle, p-cpe:/a:amazon:linux:python3.13-debug, p-cpe:/a:amazon:linux:python3.13-freethreading, p-cpe:/a:amazon:linux:python3.13-test, p-cpe:/a:amazon:linux:python3.13-devel, p-cpe:/a:amazon:linux:python3.13-freethreading-debug, p-cpe:/a:amazon:linux:python3.13-debugsource, p-cpe:/a:amazon:linux:python3.13-libs, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3.13-debuginfo
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 4/30/2026
Vulnerability Publication Date: 2/12/2026
Reference Information
CVE: CVE-2026-2297, CVE-2026-3644, CVE-2026-4224
IAVA: 2026-A-0142-S