CVE-2026-31236 Details

A critical code injection vulnerability has been identified in the llm CLI tool, affecting versions through 0.27.1. The vulnerability arises from the --functions command-line argument, which allows users to provide custom Python function definitions. However, the tool executes the supplied code using the unsafe exec() function without any sanitization, sandboxing, or security restrictions. This flaw can be exploited by crafting a malicious llm command that includes arbitrary Python code in the --functions argument and using social engineering to persuade a victim to execute it, leading to unauthorized code execution on the victim's system, potentially giving the attacker full control.