# CVE-2026-17496 — codexu NoteGen

> As of 2026-07-27, CVE-2026-17496 is a HIGH-severity vulnerability in codexu NoteGen, CVSS v3.1 8.1, EPSS 0.3% (22.2th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-17496 as of 2026-07-27; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-27

## What is CVE-2026-17496?

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).

The record classifies CVE-2026-17496 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 71 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8.1 — HIGH (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 22.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-26, last modified 2026-07-27

## Is CVE-2026-17496 being exploited?

It currently carries a trending score of 35 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **codexu**: NoteGen

## How to fix CVE-2026-17496

No vendor patch reference has been recorded for CVE-2026-17496 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-17496

No threat campaign in the Threadlinqs corpus currently references CVE-2026-17496, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-27. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — patch](https://github.com/codexu/note-gen/commit/ae3ba948c41d8a74b4a20f4c6f26fcdda2002298)
- [github.com — vendor advisory](https://github.com/codexu/note-gen/releases/tag/note-gen-v0.32.0)

**Issue tracking and product pages**

- [github.com — product](https://github.com/codexu/note-gen)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-17496
Full detection coverage and IOCs for threats exploiting CVE-2026-17496 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp