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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
NVD MITRE
7.5CVSSHIGH
EPSS Score
3.3%
Top 13.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
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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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
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-22CWE-73

Affected Products

siyuansiyuan-note
siyuanb3log
On-premWeb App
Web & CMS Plugins / cms-core
b3logoss-projectWeb & CMS Pluginsaka b3log

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

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

Timeline

Published
Mar 20, 2026
Last Updated
Mar 23, 2026

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