CVE-2026-4964 letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery

A security vulnerability has been detected in letta-ai letta 0.16.4. This vulnerability affects the function convertmessagecreatetomessage of the file letta/helpers/messagehelper.py of the component File URL Handler. Such manipulation of the argument ImageContent leads to server-side request...