CVE-2026-65644

HIGH

7.5

CVSS Score

Published: August 21, 2026 at 02:53 AM UTC

Updated: October 26, 2026 at 10:10 AM UTC

1 product affected across 1 vendorChat Rocket Chat

Using Rocket.Chat by Rocket.Chat?

Get instant alerts when new vulnerabilities affect Rocket.Chat - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Chat Rocket Chat · Rocket Chat

95%

v < 7.10.158.1.0 ≤ v < 8.1.88.2.0 ≤ v < 8.2.88.3.0 ≤ v < 8.3.88.4.0 ≤ v < 8.4.68.5.0 ≤ v < 8.5.38.6.0 ≤ v < 8.6.28.7.0

Affected range stops below 7.10.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.4.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.5.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.7.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.8.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/RocketChat/Rocket.Chat/pull/41595

References (2)

Third Party AdvisoryIssue Tracking

Source: cverecord

https://hackerone.com/reports/3872858

PatchVendor Advisory

Source: cverecord

https://github.com/RocketChat/Rocket.Chat/pull/41595

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card