High 7.8Published Jan 19, 2026

CVE-2026-23850SiYuan vulnerable to arbitrary file read

Updated under an hour ago (Oct 27, 2026, 6:00 AM ET)

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It affects siyuan-note siyuan and 1 other product. 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 siyuan-note siyuan

Exploited in the last 30 days

SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.

CVSS: 7.8 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jan 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

siyuan-note siyuan siyuan_note:siyuan (from the name)	before 3.5.4	CNA record
b3log siyuan b3log:siyuan	before 3.5.4	NVD

References

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw	x-refsource-confirm, exploit, patch, vendor-advisory
https://github.com/siyuan-note/siyuan/issues/16860	x-refsource-misc, issue-tracking, patch
https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd	x-refsource-misc, patch
https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad	x-refsource-misc, patch
https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035	x-refsource-misc, product
https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886	x-refsource-misc, product

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.