CVE-2026-48616: Rocket.chat

Critical severity, CVSS 9.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files.

Affected products

• Rocket.chat Rocket.chat: before 7.10.13 (fixed in 7.10.13); from 7.13.0, before 7.13.9 (fixed in 7.13.9); from 8.0.0, before 8.0.7 (fixed in 8.0.7); from 8.1.0, before 8.1.6 (fixed in 8.1.6); from 8.2.0, before 8.2.6 (fixed in 8.2.6); from 8.3.0, before 8.3.6 (fixed in 8.3.6); …

Published 2026-06-17. Last modified 2026-06-18.