Critical Security Update for Python 3.12: Addressing CVE-2026-11940
Summary
RHSA-2026:58902: Red Hat Security Advisory: python3.12 security update. Affects python-unversioned-command versions < 0:3.12.14-1.el10_2. Fixed in 0:3.12.14-1.el10_2. How to fix ↓
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Background
Python 3.12 is a widely used programming language that supports various programming paradigms, including procedural, object-oriented, and functional programming. It is known for its simplicity and readability, making it a popular choice among developers. The recent security vulnerability, CVE-2026-11940, affects multiple packages associated with Python 3.12, including python-unversioned-command, python3-devel, and python3-tkinter, among others. This vulnerability could potentially expose systems to security risks if not addressed promptly.
Vulnerability Detail
CVE-2026-11940 is a security vulnerability identified in Python 3.12 that allows unauthorized access to sensitive data. This issue arises from improper handling of certain inputs, which could lead to data leakage or unauthorized code execution. The vulnerability has a CVSS score of 7.3, indicating a high severity level. If exploited, it could allow attackers to gain access to confidential information or compromise the integrity of the system.
How To Fix
Minimum fixed version
0:3.12.14-1.el10_2
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 workaround, you can limit access to the affected Python packages by adjusting user permissions or utilizing a virtual environment to isolate the application. However, this is not a permanent solution and updating the packages is strongly recommended.
Conclusion
The vulnerability CVE-2026-11940 in Python 3.12 poses a significant risk to systems using affected packages. It is crucial to update to the patched version 0:3.12.14-1.el10_2 to mitigate potential security threats. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2026-11940 is a security vulnerability in Python 3.12 that could allow unauthorized access to sensitive data.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
The CVSS score of CVE-2026-11940 is 7.3, indicating a high severity level.
If immediate updates are not possible, consider implementing user permission restrictions or using a virtual environment as a temporary workaround.
More information can be found in the Red Hat Security Advisory at https://security.access.redhat.com/data/osv/RHSA-2026:58902.json.
Related vulnerabilities
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