CVE-2026-33476

SiYuan has an Unauthenticated Arbitrary File Read via Path Traversal

Published: Mar 20, 2026Updated: Mar 23, 2026 Sources: CVE List NVDCWE-22

7.5HIGH

Description

SiYuan is a personal knowledge management system. Prior to version 3.6.2, the Siyuan kernel exposes an unauthenticated file-serving endpoint under `/appearance/*filepath.` Due to improper path sanitization, attackers can perform directory traversal and read arbitrary files accessible to the server process. Authentication checks explicitly exclude this endpoint, allowing exploitation without valid credentials. Version 3.6.2 fixes this issue.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-22 CWE-73

Affected Products

siyuan-note

commercial

siyuanOn-premDesktop App

Consumer Software / productivity

b3log

oss-project

siyuanOn-premWeb App

Web & CMS Plugins / cms-core

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Collection

Discovery

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References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhgj-gg9h-rjp7

github.com

https://github.com/siyuan-note/siyuan/commit/009bb598b3beccc972aa5f1ed88b3b224326bf2a

github.com

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