What is CVE-2026-33476?

CVE-2026-33476 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-03-20.

How severe is CVE-2026-33476?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Siyuan-note Siyuan

CVE-2026-33476

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…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.004 (57.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.6.2

Weakness classification (CWE)

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhgj-gg9h-rjp7 (x_refsource_CONFIRM)
https://github.com/siyuan-note/siyuan/commit/009bb598b3beccc972aa5f1ed88b3b224326bf2a (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33476?: CVE-2026-33476 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-03-20.
How severe is CVE-2026-33476?: High severity. CVSS v3 base score is 7.5 out of 10.