CVE-2026-65644
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability42. percentile0.5%
Product
Rocket.chat
PublishedAug 21, 2026
First seenAug 21, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- rocket.chat rocket.chat7.10.15, 8.1.8, 8.2.8, 8.3.8, 8.4.6, 8.5.3, 8.6.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rocket.chat rocket.chat | v < 7.10.15, 8.1.0 ≤ v < 8.1.8, 8.2.0 ≤ v < 8.2.8, 8.3.0 ≤ v < 8.3.8, 8.4.0 ≤ v < 8.4.6, 8.5.0 ≤ v < 8.5.3, 8.6.0 ≤ v < 8.6.2, 8.7.0 | 7.10.15, 8.1.8, 8.2.8, 8.3.8, 8.4.6, 8.5.3, 8.6.2 |
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