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Vulnerability record · CVE-2026-48616 · published 17 June 2026

CVE-2026-48616: Rocket.chat improper access control vulnerability

RRocket.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. 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.

9.3 CVSS 3.0 Critical EPSS 0.39% · top 69.2% CWE-284 · Improper access control
9.3CVSS 3.0 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
18 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/RocketChat/Rocket.Chat/pull/40889 Issue TrackingPatchThird Party Advisory
https://hackerone.com/reports/3687142 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-48616), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.