CVE-2026-72918: CWE-862: Missing Authorization in RocketChat Rocket.Chat
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.
AI Analysis
Technical Summary
CVE-2026-72918 describes a missing authorization (CWE-862) vulnerability in Rocket.Chat's WebSocket protocol stream-notify-user stream. Authenticated users can write arbitrary notification bodies because the sender is not properly checked. This flaw enables the client-side UI to create ephemeral fake messages in another user's currently open chat session. The vulnerability affects multiple Rocket.Chat versions 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, where it has been fixed.
Potential Impact
An authenticated user can send arbitrary notification data that appears as ephemeral fake messages in other users' chat interfaces. This could lead to misinformation or confusion but does not impact confidentiality or availability. The CVSS 3.1 base score is 5.4 (medium), reflecting limited impact on confidentiality and integrity and no impact on availability.
Mitigation Recommendations
Upgrade Rocket.Chat to version 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, or 8.6.1 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
CVE-2026-72918: CWE-862: Missing Authorization in RocketChat Rocket.Chat
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.
CVSS v3.1
Score 5.4medium
Affected software
RocketChat
Rocket.Chat
pkg:github/rocketchat/Rocket.ChatRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-72918 describes a missing authorization (CWE-862) vulnerability in Rocket.Chat's WebSocket protocol stream-notify-user stream. Authenticated users can write arbitrary notification bodies because the sender is not properly checked. This flaw enables the client-side UI to create ephemeral fake messages in another user's currently open chat session. The vulnerability affects multiple Rocket.Chat versions 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, where it has been fixed.
Potential Impact
An authenticated user can send arbitrary notification data that appears as ephemeral fake messages in other users' chat interfaces. This could lead to misinformation or confusion but does not impact confidentiality or availability. The CVSS 3.1 base score is 5.4 (medium), reflecting limited impact on confidentiality and integrity and no impact on availability.
Mitigation Recommendations
Upgrade Rocket.Chat to version 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, or 8.6.1 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-10T17:57:26.144Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7a491dbf8831d5399d94f4
Added to database: 08/10/2026, 21:56:45 UTC
Last enriched: 08/10/2026, 22:18:11 UTC
Last updated: 09/23/2026, 01:47:44 UTC
Views: 62
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