CVE-2026-72918

Rocket.Chat: Insecure implementation of websocket notifications

MEDIUM

5.4

CVSS Score

Published: August 10, 2026 at 09:42 PM UTC

Updated: October 24, 2026 at 03:10 PM UTC

1 product affected across 1 vendorChat Rocket Chat

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Severity

MEDIUM5.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, and 8.6.1, the stream-notify-user stream in the WebSocket protocol allows an authenticated user to write arbitrary notification bodies because the sender is not checked, and the client-side UI can create an ephemeral fake message in another user's currently open chat. This issue is fixed in versions 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, and 8.6.1.

Affected

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

Chat Rocket Chat · Rocket Chat

90%

v < 7.10.14>= 8.0.0, < 8.0.8>= 8.1.0, < 8.1.7>= 8.2.0, < 8.2.7>= 8.3.0, < 8.3.7>= 8.4.0, < 8.4.5>= 8.5.0, < 8.5.2>= 8.6.0, < 8.6.1

Affected range stops below 7.10.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.0.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.4.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.6.1, 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-27jx-236m-3f5j

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.4MEDIUMGitHub_M

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

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-862

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