Critical · published January 23, 2026
🚨 An eval injection vulnerability lurking in Langflow lets attackers run arbitrary Python code without breaking a sweat! 🔥 Think of it like a restaurant where the chef is so trusting that they’ll cook anything a patron requests without checking the ingredients first. If someone hands them a recipe for a dangerous dish, the chef might just whip it up! An attacker could take complete control of the server, potentially accessing sensitive data, altering configurations, or even crashing the entire system. This is absolutely devastating for any organization using Langflow—imagine a complete takeover with just a simple, sneaky input!
Think of it like a restaurant where the chef is so trusting that they’ll cook anything a patron requests without checking the ingredients first. If someone hands them a recipe for a dangerous dish, the chef might just whip it up! The vulnerability stems from the eval_custom_component_code function, which doesn't validate user-supplied strings before executing them as Python code. This oversight allows any malicious input to be run directly in the server’s context, leading to full remote code execution.
An attacker could take complete control of the server, potentially accessing sensitive data, altering configurations, or even crashing the entire system. This is absolutely devastating for any organization using Langflow—imagine a complete takeover with just a simple, sneaky input! Patch your Langflow installation immediately to the latest version to close this gap. Implement strict input validation to ensure that any user-supplied code is thoroughly vetted before execution. Regularly audit your codebase for similar vulnerabilities to stay ahead! You've got this! With these steps, you'll not only seal the breach but also boost your security hero status! 🛡️