Review reviewCritical

CVE-2026-48616

Rocket.Chat Rocket.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.

CVSS: 9.3
EPSS: 0.33%
CISA KEV: Not listed
Published: 2026.06.17

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.33%

Technical severityCVSS 9.3

Vulnerability overview

Affected product and versions

Product: Rocket.Chat Rocket.Chat, rocket.chat
Affected versions: < 7.10.13, >= 7.13.0 < 7.13.9, >= 8.0.0 < 8.0.7, >= 8.1.0 < 8.1.6, >= 8.2.0 < 8.2.6, >= 8.3.0 < 8.3.6, >= 8.4.0 < 8.4.4, >= 8.5.0 < 8.5.1
Fixed versions: 7.10.13, 7.13.9, 8.0.7, 8.1.6, 8.2.6, 8.3.6, 8.4.4, 8.5.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Rocket.Chat Rocket.Chat, rocket.chat and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

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