CVE-2026-66750 — Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files 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-protecte…
Published: 2026-07-28 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7