Rocket.Chat up to 8.5.0 access control

Summaryinfo

A vulnerability described as critical has been identified in Rocket.Chat up to 8.5.0. The impacted element is an unknown function. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2026-48616. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Rocket.Chat up to 8.5.0 and classified as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at hackerone.com. This vulnerability was named CVE-2026-48616 since 05/22/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 7.10.13, 7.13.9, 8.0.7, 8.1.6, 8.2.6, 8.3.6, 8.4.4 or 8.5.1 eliminates this vulnerability.

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Productinfo

Type

• Chat Software

Name

• Rocket.Chat

Version

• 7.10.0
• 7.10.1
• 7.10.2
• 7.10.3
• 7.10.4
• 7.10.5
• 7.10.6
• 7.10.7
• 7.10.8
• 7.10.9
• 7.10.10
• 7.10.11
• 7.10.12
• 7.13.0
• 7.13.1
• 7.13.2
• 7.13.3
• 7.13.4
• 7.13.5
• 7.13.6
• 7.13.7
• 7.13.8
• 8.0
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.0.5
• 8.0.6
• 8.1
• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.1.4
• 8.1.5
• 8.2
• 8.2.0
• 8.2.1
• 8.2.2
• 8.2.3
• 8.2.4
• 8.2.5
• 8.3
• 8.3.0
• 8.3.1
• 8.3.2
• 8.3.3
• 8.3.4
• 8.3.5
• 8.4
• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 8.5.0

License

• free

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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