Vulnerability · Published Jun 16, 2026 · Assigned by hackerone

CVE-2026-48616

Critical 9.3

In plain English

A critical-severity improper access control in Rocket.Chat from Rocket.Chat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.0)9.3Critical

Exploit odds (30 days)0.3%top 73.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Rocket.Chat	Rocket.Chat	0 – before 8.5.10 – before 8.4.40 – before 8.3.60 – before 8.2.60 – before 8.1.60 – before 8.0.70 – before 7.13.90 – before 7.10.13

Weakness: CWE-284 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

In plain English

Official description

Affected products (as reported)

References