CVE-2026-48616 | Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0… | CVSS 9.3 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-48616
State: PUBLISHED
Assigner: hackerone
Reserved: 2026-05-22 15:00 UTC
Published: 2026-06-16 23:08 UTC
Last updated: 2026-06-16 23:08 UTC
Primary CWE: CWE-284
CWE-284 Improper Access Control - Generic
Vendor / Product: Rocket.Chat / Rocket.Chat
Sources: cve.org · NVD

Severity & Metrics

9.3 CRITICAL CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Affected products (1)

Vendor	Product	Platform	Versions
Rocket.Chat	Rocket.Chat	—	0 < 8.5.1, 0 < 8.4.4, 0 < 8.3.6, 0 < 8.2.6 …

Weakness (CWE)

CWE	Source	Description
CWE-284	cna	CWE-284 Improper Access Control - Generic

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.3	CRITICAL	3.0	cna	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

References (2)