Researchers from Zafran have identified a critical security vulnerability in a custom element that allows attackers to manipulate its properties without validation. This flaw enables unauthorized access to arbitrary files on the server, including sensitive data such as API keys, credentials, and environment variables found in the /proc/self/environ file. The issue particularly affects systems using LangChain with Chainlit, as caching can lead to user prompts and responses being stored in .chainlit/.langchain.db. This file accumulates prompts from multiple users, presenting a significant risk for data exfiltration. Zafran’s proof-of-concept exploit successfully demonstrated how such sensitive information can be accessed and compromised. Organizations must prioritize securing custom elements and implementing robust validation measures to mitigate these vulnerabilities and protect against unauthorized access to sensitive information on their servers.
Source link
