Critical Security Flaw in python3-urwid: Remote Code Execution Risk
Summary
ALSA-2026:58952: Important: python-urwid security update. Affects python3-urwid versions < 2.1.2-4.el9_8.1. Fixed in 2.1.2-4.el9_8.1. How to fix ↓
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Background
Python3-urwid is a popular library used for creating console user interfaces in Python. It provides a flexible and powerful toolkit for building interactive applications, supporting various widgets and layouts. However, a recently identified vulnerability exposes users to significant security risks, particularly concerning session management.
Vulnerability Detail
The vulnerability arises from predictable session IDs within the urwid library, which can be exploited by attackers to execute arbitrary code remotely and potentially disclose sensitive information. This flaw, cataloged as CVE-2026-9323, poses a severe threat to applications relying on this library, as it allows unauthorized access and manipulation of application behavior.
How To Fix
Minimum fixed version
2.1.2-4.el9_8.1
This is the first release that contains the fix.
sudo dnf update python3-urwidTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, consider implementing additional security controls such as session ID obfuscation or using alternative libraries that do not exhibit this vulnerability until the update can be applied.
Conclusion
The python3-urwid library has a critical vulnerability that can lead to remote code execution due to predictable session IDs. It is crucial for users to update to the latest patched version to safeguard their applications. Implementing additional security measures can provide temporary relief until the update is applied.
See every vulnerability recorded for python3-urwid →
FAQ
CVE-2026-9323 is the identifier for a security vulnerability in the python3-urwid library that allows for remote code execution due to predictable session IDs.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Failing to address this vulnerability can lead to unauthorized access, data breaches, and potential manipulation of your application, compromising user trust and security.
Yes, implementing session ID obfuscation and enhancing overall application security can help mitigate risks until the patch is applied.
For more details, refer to the CVE page associated with CVE-2026-9323, which provides comprehensive information about the vulnerability and its implications.
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