CVE-2026-23847

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.]

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777	Patch
https://github.com/siyuan-note/siyuan/issues/16844	Issue Tracking Patch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93	Exploit Vendor Advisory Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*

History

30 Jan 2026, 15:36

Type	Values Removed	Values Added
CPE		cpe:2.3:a:b3log:siyuan::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1
First Time		B3log B3log siyuan
References	~~() https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777 -~~	() https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777 - Patch
References	~~() https://github.com/siyuan-note/siyuan/issues/16844 -~~	() https://github.com/siyuan-note/siyuan/issues/16844 - Issue Tracking, Patch
References	~~() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93 -~~	() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93 - Exploit, Vendor Advisory, Patch

19 Jan 2026, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-19 20:15

Updated : 2026-01-30 15:36

NVD link : CVE-2026-23847

Mitre link : CVE-2026-23847

CVE.ORG link : CVE-2026-23847

JSON object : View

Products Affected

b3log

siyuan

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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