Is this vulnerability remotely exploitable over the internet?

It depends on how SiYuan is exposed. In typical desktop setups, exploitation occurs via the victim's browser connecting to a local instance (e.g., `localhost`), which malicious websites can target using cross-origin WebSockets. If the instance is bound to a public interface, remote attackers may connect directly.

What level of access does an attacker need to exploit this issue?

The attacker needs network reachability to the SiYuan WebSocket endpoint and the ability to initiate a WebSocket connection, such as by luring the victim into visiting a malicious web page while SiYuan is running. No valid credentials are required because the endpoint treats certain parameters as implicitly authenticated.

What is the safest general fix pattern for developers?

Enforce consistent authentication and authorization on all WebSocket endpoints, remove parameter-based authentication bypasses, and ensure that only connections with valid, server-verified sessions can subscribe to sensitive event streams. Complement this with strict origin validation for browser-initiated connections.

Severity:

HIGH RISK

(7.5)

Authentication Bypass via WebSocket Parameter Abuse (CWE-287) in SiYuan Knowledge Management

CVE-2026-32815

Published:

Mar 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

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Vulnerability Type

Category:

Authentication Bypass

CWE:

CWE-287

Impact:

Unauthorized Data Exposure and Session Activity Monitoring

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication Bypass

CWE:

CWE-287

Impact:

Unauthorized Data Exposure and Session Activity Monitoring

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Authentication Bypass via WebSocket Parameter Abuse (CWE-287) in SiYuan Knowledge Management

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

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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