Directory Traversal Vulnerability in SiYuan Personal Knowledge Management System
CVE-2026-33476

7.5HIGH

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
20 March 2026

What is CVE-2026-33476?

The SiYuan personal knowledge management system, prior to version 3.6.2, has exposed a significant security vulnerability allowing directory traversal. An unauthenticated file-serving endpoint at /appearance/*filepath fails to properly sanitize input paths. This oversight permits attackers to exploit the vulnerability, gaining unauthorized access to arbitrary server files without the need for valid credentials. Users are recommended to upgrade to the latest version to mitigate risks associated with this vulnerability.

Affected Version(s)

siyuan < 3.6.2

References

https://github.com/siyuan-note/siyuan/security/advisories...
x_refsource_CONFIRM
https://github.com/siyuan-note/siyuan/commit/009bb598b3be...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.