CVE-2026-23847

Published January 19th, 2026

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CVSS v3

6.1

MEDIUM

CVSS v2

N/A

Affected

PROJECT

Description

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. 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. Version 3.5.4 patches the issue.]

siyuan-note/siyuan

A privacy-first, self-hosted, fully open source personal knowledge management software, written in typescript and golang.

GitHub

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