Prompt Injection in LangChain Core Poses Risk to Web-Integrated AI Features

LangChain Core Vulnerability Allows Prompt Injection and Data Exposure

• A critical prompt injection vulnerability has been identified in LangChain Core, a foundational framework widely used for developing applications powered by Large Language Models (LLMs).
• This flaw permits attackers to manipulate the LLM's behavior by inserting malicious instructions, potentially leading to unauthorized data extraction, privilege escalation, or other unintended actions within web applications.
• The vulnerability highlights a significant web threat intelligence concern for browser-integrated AI assistants and web services, as it can be exploited when user-controlled inputs are processed alongside sensitive information.

Source: Security Affairs | Date: December 27, 2025

References

1. LangChain core vulnerability allows prompt injection and data exposure - Security Affairs