Critical Security Update for Python 3.9: Addressing Multiple Vulnerabilities
Summary
RHSA-2026:76945: Red Hat Security Advisory: python3.9 security update. Affects python-unversioned-command versions < 0:3.9.16-1.el9_2.15. Fixed in 0:3.9.16-1.el9_2.15. How to fix ↓
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Background
Python 3.9 is a widely-used programming language known for its readability and versatility in various applications, from web development to data analysis. The impacted packages include python-unversioned-command, python3-devel, python3-tkinter, and others, which are essential for Python development and execution in Red Hat environments. This security advisory addresses vulnerabilities that could potentially allow unauthorized access or data manipulation.
Vulnerability Detail
The vulnerabilities identified in this advisory, including CVE-2025-6069, CVE-2025-6075, and CVE-2026-15308, stem from flaws in the Python 3.9 implementation. These vulnerabilities could lead to unauthorized access, data leakage, or even remote code execution, depending on the specific exploit. The technical aspects involve issues in the handling of certain inputs and the potential for privilege escalation, making it critical for users to address these vulnerabilities promptly.
How To Fix
Minimum fixed version
0:3.9.16-1.el9_2.15
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, users can restrict access to the affected Python applications and limit their exposure to untrusted inputs until the update is applied. Additionally, consider using environment variables to control the execution context of Python scripts.
Conclusion
The Red Hat Security Advisory highlights critical vulnerabilities in Python 3.9 that require immediate attention. Users are urged to update their packages to the latest patched version to safeguard their applications against potential exploits. Regular monitoring and vulnerability management practices are essential to maintain a secure environment.
See every vulnerability recorded for python-unversioned-command →
FAQ
The advisory addresses multiple vulnerabilities, including CVE-2025-6069, CVE-2025-6075, and CVE-2026-15308, which could lead to unauthorized access and data manipulation.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by these vulnerabilities without needing to sign up.
The CVSS score of the vulnerabilities is 7.5, indicating a high severity level.
Yes, failing to update may expose your application to risks of data loss, unauthorized access, or remote code execution.
If immediate updates are not possible, implement access restrictions and validate inputs to minimize exposure to the vulnerabilities.
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