GHSA-pcjq-j3mq-jv5j

Source

https://github.com/advisories/GHSA-pcjq-j3mq-jv5j

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-pcjq-j3mq-jv5j/GHSA-pcjq-j3mq-jv5j.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-pcjq-j3mq-jv5j

Aliases

CVE-2026-23645

Published

2026-01-16T19:22:08Z

Modified

2026-01-21T16:20:45.078205Z

Severity

5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator

Summary

SiYuan Has a Stored Cross-Site Scripting (XSS) Vulnerability via Unrestricted SVG File Upload

Details

Summary

A Stored Cross-Site Scripting (XSS) vulnerability exists in SiYuan Note. The application does not sanitize uploaded SVG files. If a user uploads and views a malicious SVG file (e.g., imported from an untrusted source), arbitrary JavaScript code is executed in the context of their authenticated session.

Details

The application allows authenticated users to upload files, including .svg images, without sanitizing the input to remove embedded JavaScript code (such as <script> tags or event handlers).

PoC

Create a new "Daily note" in the workspace. <img width="1287" height="572" alt="image" src="https://github.com/user-attachments/assets/3a4389b9-695d-4e1b-94dc-72efdb047aa9" />

Create a file named test.svg with malicious JavaScript inside:

<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200" viewBox="0 0 124 124" fill="none">
<rect width="124" height="124" rx="24" fill="red"/>
   <script type="text/javascript">  
      alert(window.origin);
   </script>
</svg>

Upload a file in current daily note: <img width="1617" height="316" alt="image" src="https://github.com/user-attachments/assets/6e14318a-08ec-48e5-b278-9174ad17cfcb" /> <img width="1482" height="739" alt="image" src="https://github.com/user-attachments/assets/95c996e8-5591-436a-9467-ab56c9ffbde0" /> <img width="1321" height="548" alt="image" src="https://github.com/user-attachments/assets/249fb187-3caa-4372-a9c9-56dfda6b8a8f" />
Open the file:

Right-click the uploaded asset in the note.
Select "Export" <img width="934" height="718" alt="image" src="https://github.com/user-attachments/assets/ec943dfa-92ba-47f6-8b1e-56e53f1b0ca6" />

The JavaScript code executes immediately. <img width="1033" height="632" alt="image" src="https://github.com/user-attachments/assets/a1611291-d333-4f8e-9da9-62104aaa1bdd" /> <img width="1381" height="641" alt="image" src="https://github.com/user-attachments/assets/d5018203-dbd0-4285-8702-8cb3e7c5cd07" />

Impact

The vulnerability allows to upload an SVG file containing malicious scripts. When a user exports this file, the embedded arbitrary JavaScript code is executed within their browser context

Notes

Tested version: <img width="1440" height="534" alt="image" src="https://github.com/user-attachments/assets/a62271e4-6850-4f59-be88-c4f8055429c0" />

Solution

https://github.com/siyuan-note/siyuan/issues/16844

Database specific

{
    "cwe_ids": [
        "CWE-79"
    ],
    "severity": "MODERATE",
    "nvd_published_at": "2026-01-16T20:15:49Z",
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-16T19:22:08Z"
}

References

Affected packages

Go / github.com/siyuan-note/siyuan/kernel

Package

Name: github.com/siyuan-note/siyuan/kernel; View open source insights on deps.dev
Purl: pkg:golang/github.com/siyuan-note/siyuan/kernel

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.0.0-20260116101155-11115da3d0de

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-pcjq-j3mq-jv5j/GHSA-pcjq-j3mq-jv5j.json"