CVE-2026-65644CWE-79cross-site-scripting

CVE-2026-65644

High · published August 21, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00479 · 40.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-21T08:18Z
Affected products (8)
ProductVersionsFixed in
rocket.chat/rocket.chat< 7.10.157.10.15
rocket.chat/rocket.chat≥ 8.1.0, < 8.1.88.1.8
rocket.chat/rocket.chat≥ 8.2.0, < 8.2.88.2.8
rocket.chat/rocket.chat≥ 8.3.0, < 8.3.88.3.8
rocket.chat/rocket.chat≥ 8.4.0, < 8.4.68.4.6
rocket.chat/rocket.chat≥ 8.5.0, < 8.5.38.5.3
rocket.chat/rocket.chat≥ 8.6.0, < 8.6.28.6.2
rocket.chat/rocket.chatall versions—
References (2)
https://github.com/RocketChat/Rocket.Chat/pull/41595 · [email protected]https://hackerone.com/reports/3872858 · [email protected]
EPSS history
Timeline
  • 21 AUG 02:53Z
    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…
    cvelistv5