Critical Security Update for Python Packages: CVE-2026-11940
Summary
RHSA-2026:63024: Red Hat Security Advisory: python3.12 security update. Affects python-unversioned-command versions < 0:3.12.9-2.el10_0.11. Fixed in 0:3.12.9-2.el10_0.11. How to fix ↓
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Background
Python is a widely-used high-level programming language known for its readability and versatility. The impacted packages, including python-unversioned-command, python3-devel, and python3-libs, are essential components of the Python ecosystem in Red Hat Enterprise Linux. These packages provide various functionalities such as development tools, libraries, and graphical interfaces for Python applications. The vulnerability in question affects these packages, potentially exposing systems to security risks.
Vulnerability Detail
CVE-2026-11940 is a security vulnerability that arises from improper handling of certain inputs in Python 3.12. This flaw can lead to unauthorized access, data leakage, or even system compromise. The vulnerability has a CVSS score of 7.3, indicating a high severity level. Attackers could exploit this vulnerability to execute arbitrary code or manipulate sensitive data, posing significant risks to applications relying on the affected Python packages.
How To Fix
Minimum fixed version
0:3.12.9-2.el10_0.11
This is the first release that contains the fix.
sudo dnf update python-unversioned-commandTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to the affected Python packages or restrict their use in critical applications until the update is applied. Additionally, implementing strict input validation in applications using these packages may help mitigate the risk of exploitation.
Conclusion
The CVE-2026-11940 vulnerability poses significant risks to systems using affected Python packages in Red Hat Enterprise Linux. It is crucial to update to the patched version to mitigate these risks. Users are encouraged to monitor their applications for vulnerabilities using tools like Vulert, which can alert in real-time without requiring code access.
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FAQ
CVE-2026-11940 is a security vulnerability in Python 3.12 that can lead to unauthorized access and data leakage.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability.
The CVSS score of this vulnerability is 7.3, indicating a high severity level.
Update the affected packages to version 0:3.12.9-2.el10_0.11 or later using the command: 'sudo yum update python3 python3-devel python3-libs ...'.
Yes, you can limit access to the affected packages and implement strict input validation as temporary measures.
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