CVE-2026-31949: LibreChat is a ChatGPT clone with additional features. Prior to 0.8.3-rc1, a Denial of Service (DoS) vulnerability exist

LibreChat, a ChatGPT alternative with extra features, has a vulnerability in versions before 0.8.3-rc1 where an authenticated attacker can crash the server by sending malformed requests to a specific endpoint. The bug occurs because the code tries to extract data from a request without checking if it exists first, causing an unhandled error (a TypeError, which is a type of programming mistake) that shuts down the entire Node.js server process.