ChatterMate — Vulnerability (CVE-2026-24399)
Date: 2026-01
Affected: chattermate/chattermate
Attack vector: xss
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-24399
CWE: CWE-79
CVSS: 9.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N)

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.


Mitigations:

Architectural layers (MAESTRO):