CVE-2026-23645

SiYuan is self-hosted, open source personal knowledge management software. Prior to 3.5.4-dev2, 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. This vulnerability is fixed in 3.5.4-dev2.

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/11115da3d0de950593ee4ce375cf7f9018484388	Patch
https://github.com/siyuan-note/siyuan/issues/16844	Issue Tracking Patch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pcjq-j3mq-jv5j	Exploit Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:b3log:siyuan::::::::
	cpe:2.3:a:b3log:siyuan:3.5.4:dev1::::::

History

30 Jan 2026, 19:32

Type	Values Removed	Values Added
First Time		B3log B3log siyuan
CPE		cpe:2.3:a:b3log:siyuan:3.5.4:dev1:::::: cpe:2.3:a:b3log:siyuan::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.1
References	~~() https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388 -~~	() https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388 - 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-pcjq-j3mq-jv5j -~~	() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pcjq-j3mq-jv5j - Exploit, Vendor Advisory, Patch

16 Jan 2026, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-16 20:15

Updated : 2026-01-30 19:32

NVD link : CVE-2026-23645

Mitre link : CVE-2026-23645

CVE.ORG link : CVE-2026-23645

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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