Template Injection in LangChain Mustache Callable Scopes Leading to Remote Code Execution: CVE Pending

Template Injection in LangChain Mustache Callable Scopes Leading to Remote Code Execution: CVE Pending

Sept. 1, 2025 | Categories: Vulnerabilities

A template injection vulnerability exists in LangChain's Mustache template processing engine that allows attackers to execute arbitrary Python code through user-controlled callable scopes

Template Injection in LangChain Mustache Callable Scopes Leading to Remote Code Execution

Date: September 1, 2025 · Author: Karma-X Research Team

Severity: Medium to High Status: Unpatched · Active Exploitation: Unknown

Reference: LangChain Repository · Langflow Botnet Exploitation · Report to Huntr.com

SECURITY ALERT: This vulnerability is currently unpatched in all LangChain versions and similar vulnerabilities are being actively exploited in platforms like Langflow. The Flodrix botnet campaign has already compromised thousands of servers using this vulnerability...

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