CVE-2026-24399 CRITICAL

CVE-2026-24399: ChatterMate has Stored Cross-Site Scripting (XSS) via Chatbot Input Execution

Vendor Chattermate
Product chattermate.chat
Weakness CWE-79 · XSS
Published January 24, 2026
Last update January 26, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

What the vulnerability does

01Description

ChatterMate is a no-code AI chatbot agent framework. In versions 1.0.8 and below, the chatbot accepts and executes malicious HTML/JavaScript payloads when supplied as chat input. Specifically, an <iframe> payload containing a javascript: URI can be processed and executed in the browser context. This allows access to sensitive client-side data such as localStorage tokens and cookies, resulting in client-side injection. This issue has been fixed in version 1.0.9.

Key dates

02Disclosure timeline

January 24, 2026 CVE published
January 26, 2026 Record updated