NoteGen before 0.32.0 renders AI chat responses with markdown-it configured with html:true and injects the result into the DOM via dangerouslySetInnerHTML in chat-preview, without HTML sanitization and with CSP set to null. Attacker-controlled content that reaches the model prompt (for example a malicious skill REFERENCE.md that instructs the model to emit HTML) can cause the model response to include executable markup such as an img onerror handler. When the user views the chat response, that markup runs as JavaScript in the privileged Tauri webview, enabling arbitrary script execution in the application context (cross-site scripting).
Affects the NoteGen desktop application on a default installation. Exploitation requires user interaction to install or otherwise load attacker-influenced skill/content and to view a chat response that includes the malicious HTML. No non-default configuration is required; CSP is null in affected builds.
Upgrade to NoteGen 0.32.0 or later. The fix replaces unsanitized markdown-it HTML injection in chat preview with Streamdown-based rendering that hardens/sanitizes untrusted HTML in model output.