CVE-2026-65644: Rocket.chat

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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

• Rocket.chat Rocket.chat: before 7.10.15 (fixed in 7.10.15); from 8.1.0, before 8.1.8 (fixed in 8.1.8); from 8.2.0, before 8.2.8 (fixed in 8.2.8); from 8.3.0, before 8.3.8 (fixed in 8.3.8); from 8.4.0, before 8.4.6 (fixed in 8.4.6); from 8.5.0, before 8.5.3 (fixed in 8.5.3); …

Published 2026-08-21. Last modified 2026-09-04.