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VULNERABILITIES

CVE-2026-23645 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388 [email protected]Patch
https://github.com/siyuan-note/siyuan/issues/16844 [email protected]Issue TrackingPatch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pcjq-j3mq-jv5j [email protected]ExploitPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

ProductVersions
b3log siyuan
< 3.5.4
3.5.4 dev1

CPE

  • cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*
  • cpe:2.3:a:b3log:siyuan:3.5.4:dev1:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-23645
NVD Published Date:
Jan 16, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-23645 Details - Not Deferred