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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-06-24 | Updated 2026-06-26 | Assigner GitHub_M




HIGH: 8.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Problem types

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

Product status

>= 8.5.0-rc.0, < 8.5.0
affected

>= 8.4.0-rc.0, < 8.4.1
affected

>= 8.3.0-rc.0, < 8.3.3
affected

>= 8.2.0-rc.0, < 8.2.3
affected

>= 8.1.0-rc.0, < 8.1.4
affected

>= 8.0.0-rc.0, < 8.0.5
affected

>= 7.11.0-rc.0, < 7.13.7
affected

< 7.10.11
affected

References

github.com/...t.Chat/security/advisories/GHSA-fhc2-x8cp-c5ch

cve.org (CVE-2026-45687)

nvd.nist.gov (CVE-2026-45687)

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