CVE-2026-48616

Name: CVE-2026-48616
Creator: NVD / NIST
Published: 2026-06-17T13:20:42.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.30%

Last modified Jun 18, 2026

CVE-2026-48616 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.0

9.3/10

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

EPSS Probability

0.30%

22.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Rocket.Chat	Rocket.Chat	< 7.10.13
Rocket.Chat	Rocket.Chat	>= 7.13.0, < 7.13.9
Rocket.Chat	Rocket.Chat	>= 8.0.0, < 8.0.7
Rocket.Chat	Rocket.Chat	>= 8.1.0, < 8.1.6
Rocket.Chat	Rocket.Chat	>= 8.2.0, < 8.2.6
Rocket.Chat	Rocket.Chat	>= 8.3.0, < 8.3.6
Rocket.Chat	Rocket.Chat	>= 8.4.0, < 8.4.4
Rocket.Chat	Rocket.Chat	>= 8.5.0, < 8.5.1

References

https://github.com/RocketChat/Rocket.Chat/pull/40889Issue Tracking, Patch, Third Party Advisory
https://hackerone.com/reports/3687142Third Party Advisory

Timeline

Published: Jun 17, 2026
Last Modified: Jun 18, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-48616?

How severe is CVE-2026-48616?

CVE-2026-48616 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2026-48616?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-48616?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST