🛡️ CVE-2026-48616 — rocket.chat

🔴 CVSS 9.3 — Critical ✅ No Known Exploit CWE-284 NVD
9.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity low, availability none.

Weakness class

CVE-2026-48616 is classified as CWE-284: Improper Access Control. The software does not restrict an action to the actors that should be allowed to perform it.

Affected software

CVE-2026-48616 is recorded against 1 package.

  • rocket.chat (from 8.5.0 up to 8.5.1)

Timeline and source

Published on 17 June 2026 and last revised on 18 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
hackerone.com

Details

Severity CRITICAL
CVSS Score 9.3
CVSS Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CWE CWE-284
Public Exploit ✅ No
Source NVD
Published 2026-06-17
Updated 2026-08-11
Modified 2026-06-18

Affected Packages

Software From version Fixed in
rocket.chat 8.5.0 8.5.1

References

Issue Tracking, Patch, Third Party Advisory https://github.com/RocketChat/Rocket.Chat/pull/40889

Similar Threats

Exploit Protection

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