๐Ÿ›ก๏ธ CVE-2026-31807
๐ŸŸก CVSS 6.1 โ€” Medium โœ… No Known Exploit CWE-79 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer (SanitizeSVG) blocks dangerous elements (, , ) and removes on* event handlers and javascript: in href attributes. However, it does NOT block SVG animation elements (, ) which can dynamically set attributes to dangerous values at runtime, bypassing the static sanitization. This allows an attacker to inject executable JavaScript into the unauthenticated /api/icon/getDynamicIcon endpoint (type=8), creating a reflected XSS. This is a bypass of the fix for CVE-2026-29183 (fixed in v3.5.9). This vulnerability is fixed in v3.5.10.

Details

Severity Medium
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit โœ… No
Source NVD
Published 2026-03-10
Updated 2026-06-15
Modified 2026-03-23
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/siyuan-note/siyuan/kernel โ€” โ€”
siyuan โ€” 3.5.10

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