Medium 6.1Published Jan 16, 2026

CVE-2026-23645SiYuan is self-hosted, open source personal knowledge management software.

Updated under an hour ago (2026-10-19 09:30 UTC)

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It affects b3log siyuan. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for b3log siyuan

Exploited in the last 30 days

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: 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

b3log siyuan b3log:siyuan	before 3.5.4; 3.5.4	NVD

References

https://github.com/siyuan-note/siyuan/commit/11115da3d0de950593ee4ce375cf7f9018484388patch
https://github.com/siyuan-note/siyuan/issues/16844issue-tracking, patch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-pcjq-j3mq-jv5jexploit, patch, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.