Rocket.Chat <8.8.0 REST API XSS via unsanitized visitor name
CVE-2026-65644 Published on August 21, 2026
Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6, 8.3.8, 8.2.8, 8.1.8, and 7.10.15 has a REST API endpoint POST /api/v1/livechat/visitor that accepts an unauthenticated, unsanitized name field for Livechat visitors. This name is stored raw and later rendered via dangerouslySetInnerHTML in the Omnichannel Queue side panel (InquireSidePanelItem.tsx), injecting a real, clickable HTML link - pointing to any attacker-controlled domain, with arbitrary social-engineering text - into the DOM of any agent viewing the queue.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-65644 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-65644
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Affected Versions
Rocket.Chat:- Before 8.8.0 is affected.
- Before 8.7.1 is affected.
- Before 8.6.2 is affected.
- Before 8.5.3 is affected.
- Before 8.4.6 is affected.
- Before 8.3.8 is affected.
- Before 8.2.8 is affected.
- Before 8.1.8 is affected.
- Before 7.10.15 is affected.