CVE-2026-33476

HIGH EPSS 86.8%
Published Mar 20, 20263mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 20, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
86.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-22 Path Traversal Resource Mgmt
CWE-73

Affected Products 1

VendorProductVersionRange
b3logsiyuan* <3.6.2

References 2

  • github.com https://github.com/siyuan-note/siyuan/commit/009bb598b3beccc972aa5f1ed88b3b224326bf2a
    Patch
  • github.com https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hhgj-gg9h-rjp7
    ExploitVendor Advisory

Remediation

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