Vim Command Line Text Editor Vulnerability in Python Omni-Completion

CVE-2026-57456

What is CVE-2026-57456?

A significant security vulnerability exists in Vim, an open-source command line text editor, prior to version 9.2.0699. This flaw arises from the Python omni-completion feature, where unescaped docstrings are executed during the completion process. When reconstructing function and class definitions, user-controlled input from the active buffer is directly processed, allowing an attacker to craft a malicious buffer that can execute arbitrary Python code. This issue highlights the need for vigilant development practices and the importance of keeping software up to date to mitigate such risks.

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