GHSA-w836-5gpm-7r93

Suggest an improvement
Source
https://github.com/advisories/GHSA-w836-5gpm-7r93
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-w836-5gpm-7r93/GHSA-w836-5gpm-7r93.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-w836-5gpm-7r93
Aliases
Published
2026-01-21T01:00:44Z
Modified
2026-02-03T22:41:00.312284Z
Severity
  • 4.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
  • 2.1 (Low) 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/E:P CVSS Calculator
Summary
SiYuan has a Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon
Details

Summary

Reflected XSS in /api/icon/getDynamicIcon due to unsanitized SVG input.

Details

The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript.

PoC

Payload: test</text><script>alert(window.origin)</script><text>

  1. Open any note and click Change Icon -> Dynamic (Text). <img width="713" height="373" alt="image" src="https://github.com/user-attachments/assets/8a4f5ec4-81d6-46cb-8872-841cb2188ed8" />

  2. Change color and paste the payload into the Custom field and click on this icon. <img width="935" height="682" alt="image" src="https://github.com/user-attachments/assets/24d28fbd-a3ce-44f1-a5bb-2cc3f711faf5" />

  3. Intercept and send the request or get path from devtools <img width="1229" height="627" alt="image" src="https://github.com/user-attachments/assets/3cfb1d9a-5a23-476c-86cc-f9a7de6bbe32" /> <img width="1140" height="764" alt="image" src="https://github.com/user-attachments/assets/2657e44f-3724-4136-a53f-75068945aef0" />

  4. The JavaScript payload executes afted open URL. <img width="701" height="809" alt="image" src="https://github.com/user-attachments/assets/343ad67a-e236-466b-9ec9-e4f1dea4fd5e" /> <img width="1382" height="847" alt="image" src="https://github.com/user-attachments/assets/01820d3c-c374-402a-8d72-6ea75dbd92c2" />

Impact

Arbitrary JavaScript execution in the user's session context if the SVG is loaded directly. It also prevents using legitimate characters like < or > in icon text.

Note

Tested version: <img width="1368" height="699" alt="image" src="https://github.com/user-attachments/assets/a7466b8f-a88b-461d-8d9e-7178af7ab076" />

Database specific 
{
    "github_reviewed_at": "2026-01-21T01:00:44Z",
    "severity": "LOW",
    "cwe_ids": [
        "CWE-79"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2026-01-19T20:15:49Z"
}
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
0.0.0-20260118021606-5c0cc375b475

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-w836-5gpm-7r93/GHSA-w836-5gpm-7r93.json"