by Kastro
Paper/Archive/CVE-2026-48616

CVE-2026-48616

Rocket.Chat Rocket.Chat — 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.

EPSS 0.3%CVSS 9.3
critical.is priorityof 100
33
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 26.5.265 × 205.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Rocket.Chat< 8.5.18.5.1CNA
Rocket.Chat< 8.4.48.4.4CNA
Rocket.Chat< 8.3.68.3.6CNA
Rocket.Chat< 8.2.68.2.6CNA
Rocket.Chat< 8.1.68.1.6CNA
Rocket.Chat< 8.0.78.0.7CNA
Rocket.Chat< 7.13.97.13.9CNA
Rocket.Chat< 7.10.137.10.13CNA

Scores by source

hackerone (CNA)9.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refhackerone.com/reports/3687142refgithub.com/RocketChat/Rocket.Chat/pull/40889