CVE-2026-45687

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

HIGH

8.5

CVSS Score

Published: June 24, 2026 at 08:55 PM UTC

Updated: October 25, 2026 at 10:10 PM UTC

1 product affected across 1 vendorChat Rocket Chat

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Severity

HIGH8.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Chat Rocket Chat · Rocket Chat

90%

v < 7.10.11>= 7.11.0-rc.0, < 7.13.7 >= 8.0.0-rc.0, < 8.0.5 >= 8.1.0-rc.0, < 8.1.4 >= 8.2.0-rc.0, < 8.2.3 >= 8.3.0-rc.0, < 8.3.3 >= 8.4.0-rc.0, < 8.4.1 >= 8.5.0-rc.0, < 8.5.0

Affected range stops below 7.10.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.13.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.0.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.4.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.5HIGHGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-915

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