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

Quick assessment

Affected
codexu NoteGen
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

codexu NoteGen是codexu个人开发者的一个笔记生成服务器产品。 codexu NoteGen 0.32.0之前版本存在跨站脚本漏洞，该漏洞源于markdown-it配置为html:true并且使用dangerouslySetInnerHTML注入到DOM，没有HTML清理和CSP设置，容易受到跨站脚本攻击。

CVSS 8.1 · High EPSS 0.55% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
codexu NoteGen < 0.32.0 affected
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I. Basic Information for CVE-2026-17496

Vulnerability Information
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Vulnerability Title
NoteGen chat preview XSS via unsanitized AI/skill HTML rendering
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
codexu NoteGen 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
codexu NoteGen是codexu个人开发者的一个笔记生成服务器产品。 codexu NoteGen 0.32.0之前版本存在跨站脚本漏洞，该漏洞源于markdown-it配置为html:true并且使用dangerouslySetInnerHTML注入到DOM，没有HTML清理和CSP设置，容易受到跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
codexu NoteGen 0 ~ 0.32.0 -

II. Public POCs for CVE-2026-17496

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7523 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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POC zip download
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III. Intelligence Information for CVE-2026-17496

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Vendor Pages for CVE-2026-17496 (1)

IV. Related Vulnerabilities

Same product: NoteGen
Same vendor: codexu
Same weakness: CWE-79

V. Comments for CVE-2026-17496

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