Critical Security Flaws in Python 3.14: Command Injection and XSS Vulnerabilities
Summary
ALSA-2026:28581: Important: python3.14 security, bug fix, and enhancement update. Affects python3.14 versions < 3.14.5-1.el10_2. Fixed in 3.14.5-1.el10_2. How to fix ↓
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Background
Python 3.14 is an interpreted, interactive, object-oriented programming language widely used for various applications, including web development, data analysis, artificial intelligence, and more. It supports dynamic data types and offers extensive libraries and frameworks. However, recent vulnerabilities have been identified that could compromise the security of applications utilizing this version.
Vulnerability Detail
The vulnerabilities in Python 3.14 include arbitrary code execution via command injection in the webbrowser.open() API (CVE-2026-4786) and a Cross-Site Scripting (XSS) vulnerability in the http.cookies module (CVE-2026-6019). These vulnerabilities could allow attackers to execute arbitrary code on the server or client-side, leading to unauthorized access or data breaches.
How To Fix
Minimum fixed version
3.14.5-1.el10_2
This is the first release that contains the fix.
sudo dnf update python3.14Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, avoid using the affected APIs until the update can be applied. For web applications, implement input validation and sanitization to mitigate the risk of XSS attacks.
Conclusion
In summary, Python 3.14 has critical vulnerabilities that need immediate attention. Updating to the latest version is essential to safeguard applications from potential attacks. Utilize tools like Vulert to monitor and manage vulnerabilities effectively.
See every vulnerability recorded for python3.14 →
FAQ
The main vulnerabilities are command injection in the webbrowser.open() API and an XSS vulnerability in the http.cookies module.
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These vulnerabilities can lead to arbitrary code execution and potential data breaches, compromising the security of applications.
Yes, a patch is available in version 3.14.5-1.el10_2 of Python 3.14.
If you cannot update immediately, avoid using the affected APIs and implement input validation to reduce the risk of exploitation.
Related vulnerabilities
Recent vulnerabilities recorded for python3.14.
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