RocketChat Rocket.Chat up to 8.4.x Set dynamically-determined object attributes

Summaryinfo

A vulnerability identified as critical has been detected in RocketChat Rocket.Chat up to 8.4.x. Affected by this vulnerability is an unknown functionality. The manipulation of the argument Set leads to dynamically-determined object attributes. This vulnerability is documented as CVE-2026-45687. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in RocketChat Rocket.Chat up to 8.4.x. It has been rated as critical. This issue affects some unknown functionality. The manipulation of the argument set with an unknown input leads to a dynamically-determined object attributes vulnerability. Using CWE to declare the problem leads to CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's sendFileMessage DDP method passes the entire attacker-supplied file object into Uploads.updateFileComplete, which merges it directly into a MongoDB $set update via Object.assign. There is no allow-list of writable fields. An attacker can therefore rewrite any column on their own upload record, notably store and the store-specific path fields. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-45687 since 05/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 7.10.11, 7.13.7, 8.0.5, 8.1.4, 8.2.3, 8.3.3, 8.4.1 or 8.5.0 eliminates this vulnerability.

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Productinfo

Type

• Chat Software

Vendor

• RocketChat

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
• 7.13.0
• 7.13.1
• 7.13.2
• 7.13.3
• 7.13.4
• 7.13.5
• 7.13.6
• 8.0
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.1
• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.2
• 8.2.0
• 8.2.1
• 8.2.2
• 8.3
• 8.3.0
• 8.3.1
• 8.3.2
• 8.4
• 8.4.0

License

• free

Website

• Product: https://github.com/RocketChat/Rocket.Chat/

CPE 2.3info

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CPE 2.2info

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