CVE-2026-66750

EIP tracks 1 public exploit for CVE-2026-66750. PoCs published by theopaid.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2026-66750, an authorization bypass vulnerability in Let's Chat's file download endpoint. The vulnerability allows unauthorized file downloads from private or password-protected rooms due to missing access controls, specifically the lack of a room membership check in the download route.

Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.