Detections
Analytics

CentOS 9 : python3.9-3.9.25-10.el9

high Nessus Plugin ID 337900

Synopsis

The remote CentOS host is missing a security update for python-unversioned-command.

Description

The remote CentOS Linux 9 host has packages installed that are affected by a vulnerability as referenced in the python3.9-3.9.25-10.el9 build changelog.

 - tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330. (CVE-2026-11940)

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

Solution

Update the CentOS 9 Stream python-unversioned-command package.

See Also

https://kojihub.stream.centos.org/koji/buildinfo?buildID=124828

Plugin Details

Severity: High

ID: 337900

File Name: centos9_python3_9-3_9_25-10_124828.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/19/2026

Updated: 8/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.59

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-11940

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

CVSS v4

Risk Factor: High

Base Score: 7.8

Threat Score: 4.7

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:N/SC:H/SI:H/SA:N

Vulnerability Information

CPE: cpe:/a:centos:centos:9, p-cpe:/a:centos:centos:python-unversioned-command, p-cpe:/a:centos:centos:python3-debug, p-cpe:/a:centos:centos:python3-devel, p-cpe:/a:centos:centos:python3-idle, p-cpe:/a:centos:centos:python3-libs, p-cpe:/a:centos:centos:python3-test, p-cpe:/a:centos:centos:python3-tkinter, p-cpe:/a:centos:centos:python3

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/14/2026

Vulnerability Publication Date: 6/23/2026

Reference Information

CVE: CVE-2026-11940