RHEL 9 : python3.12 (RHSA-2026:19177)

critical Nessus Plugin ID 315485

Synopsis

The remote Red Hat host is missing one or more security updates for python3.12.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:19177 advisory.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

* expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375)

* python: Quadratic complexity in os.path.expandvars() with user-controlled template (CVE-2025-6075)

* cpython: Out-of-memory when loading Plist (CVE-2025-13837)

* cpython: Header injection via newlines in data URL mediatype in Python (CVE-2025-15282)

* cpython: Header injection in http.cookies.Morsel in Python (CVE-2026-0672)

* cpython: CPython: Logging Bypass in Legacy .pyc File Handling (CVE-2026-2297)

* cpython: Incomplete control character validation in http.cookies (CVE-2026-3644)

* cpython: Stack overflow parsing XML with deeply nested DTD content models (CVE-2026-4224)

* python: Python: Command-line option injection in webbrowser.open() via crafted URLs (CVE-2026-4519)

* python: Python: HTTP header injection via CR/LF in proxy tunnel headers (CVE-2026-1502)

* python: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules (CVE-2026-6100)

* python: cpython: Python: Arbitrary code execution via command injection in webbrowser.open() API (CVE-2026-4786)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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

Update the RHEL python3.12 package based on the guidance in RHSA-2026:19177.

Plugin Details

Severity: Critical

ID: 315485

File Name: redhat-RHSA-2026-19177.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/19/2026

Updated: 5/19/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2026-4519

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 3

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.1

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:P

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

CVSS Score Source: CVE-2026-6100

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:python3.12-tkinter, p-cpe:/a:redhat:enterprise_linux:python3.12-libs, p-cpe:/a:redhat:enterprise_linux:python3.12-test, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:python3.12-idle, p-cpe:/a:redhat:enterprise_linux:python3.12-debug, p-cpe:/a:redhat:enterprise_linux:python3.12, p-cpe:/a:redhat:enterprise_linux:python3.12-devel, cpe:/o:redhat:rhel_eus:9.8

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/19/2026

Vulnerability Publication Date: 6/10/2025

Reference Information

CVE: CVE-2025-13837, CVE-2025-15282, CVE-2025-59375, CVE-2025-6075, CVE-2026-0672, CVE-2026-1502, CVE-2026-2297, CVE-2026-3644, CVE-2026-4224, CVE-2026-4519, CVE-2026-4786, CVE-2026-6100

CWE: 770, 778, 791, 805, 825, 88, 93

RHSA: 2026:19177

Detections

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