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CVE-2026-23850

Good to know:

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Date: January 19, 2026

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.

Severity Score

Related Resources (9)

https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad
https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd
https://github.com/siyuan-note/siyuan/issues/16860
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw
https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035
https://github.com/siyuan-note/siyuan
https://nvd.nist.gov/vuln/detail/CVE-2026-23850
https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886
https://www.mend.io/vulnerability-database/CVE-2026-23850

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

Top Fix

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Upgrade Version

Upgrade to version github.com/siyuan-note/siyuan - v3.5.4;github.com/siyuan-note/siyuan/kernel - v0.0.0-20260118092326-b2274baba2e1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): LOW
Availability (A): NONE

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