CVE-2026-45687

Rocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMessage

State: Published
Severity: 8.5 High
Published: Jun 24, 2026
Updated: Jun 26, 2026
Reserved: May 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.5 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N	GitHub_M

Weaknesses

CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

Affected Products

Product	Versions
Rocket.ChatRocketChat	>= 8.5.0-rc.0, < 8.5.0Affected >= 8.4.0-rc.0, < 8.4.1Affected >= 8.3.0-rc.0, < 8.3.3Affected >= 8.2.0-rc.0, < 8.2.3Affected >= 8.1.0-rc.0, < 8.1.4Affected >= 8.0.0-rc.0, < 8.0.5Affected >= 7.11.0-rc.0, < 7.13.7Affected < 7.10.11Affected

References

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-fhc2-x8cp-c5ch

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