CVE-2025-46059: langchain-ai v0.3.51 was discovered to contain an indirect prompt injection vulnerability in the GmailToolkit component.

LangChain AI version 0.3.51 contains an indirect prompt injection vulnerability (a technique where attackers hide malicious instructions in data like emails to trick AI systems) in its GmailToolkit component that could allow attackers to run arbitrary code through crafted emails. However, the supplier disputes this, arguing the actual vulnerability comes from user code that doesn't follow LangChain's security guidelines rather than from LangChain itself.