Is this vulnerability remotely exploitable?

It can be, if a remote user or integration can supply markdown that the server renders to HTML. In such deployments, a remote actor may trigger local file disclosure without needing direct filesystem access.

What level of access does an attacker need?

The attacker generally needs the ability to create, edit, or inject markdown content that is processed on the server. This may correspond to a standard authenticated user role or any upstream system that feeds markdown into SiYuan.

What is the safest general fix pattern?

The most robust fix is to strictly confine all file access during rendering to a small set of approved directories and to normalize and validate paths against that allowlist. Disabling or heavily restricting features that can directly reference local files from markdown also reduces risk.

Severity:

HIGH RISK

(7.5)

Path Traversal (CWE-22) in SiYuan Markdown HTML Rendering

CVE-2026-23850

Published:

Jan 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Path Traversal / Local File Disclosure

CWE:

CWE-22

Impact:

Local File Disclosure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Local File Disclosure

CWE:

CWE-22

Impact:

Local File Disclosure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Path Traversal (CWE-22) in SiYuan Markdown HTML Rendering

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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