CVE-2026-72918

Rocket.Chat: Insecure implementation of websocket notifications

State: Published
Severity: 5.4 Medium
Published: Aug 10, 2026
Updated: Aug 11, 2026
Reserved: Aug 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
Rocket.ChatRocketChat	< 7.10.14Affected >= 8.0.0, < 8.0.8Affected >= 8.1.0, < 8.1.7Affected >= 8.2.0, < 8.2.7Affected >= 8.3.0, < 8.3.7Affected >= 8.4.0, < 8.4.5Affected >= 8.5.0, < 8.5.2Affected >= 8.6.0, < 8.6.1Affected

References

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-27jx-236m-3f5j

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