Vulnerability · Published Aug 21, 2026 · Assigned by hackerone
CVE-2026-65644
High 7.5
In plain English
A high-severity cross-site scripting in Rocket.Chat from Rocket.Chat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Rocket.Chat | Rocket.Chat | 0 – before 8.8.00 – before 8.7.10 – before 8.6.20 – before 8.5.30 – before 8.4.60 – before 8.3.80 – before 8.2.80 – before 8.1.8 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N