Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M
CVE-2026-33476SiYuan has an Unauthenticated Arbitrary File Read via Path Traversal
High 7.5
In plain English
A high-severity path traversal in siyuan from siyuan-note. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 89% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/siyuan-note/siyuan/kernel | no fix listed | GHSA-hhgj-gg9h-rjp7 |
| Go | github.com/siyuan-note/siyuan/kernel | no fix listed | GO-2026-4802 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| siyuan-note | siyuan | < 3.6.2 |
Weakness: CWE-22, CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N