Is this vulnerability remotely exploitable, or does it require local access?

Exploitability depends on how the `/api/notification/pushMsg` endpoint is exposed. If it is reachable over the network or via features that accept remote input, an attacker may be able to inject malicious notification messages remotely; if it is restricted to local use, exploitation typically requires local or internal access to that interface.

What level of access does an attacker need to trigger this vulnerability?

An attacker must be able to influence the `msg` parameter that ultimately reaches the notification API. This could occur through direct HTTP access to `/api/notification/pushMsg`, through another application feature that calls this endpoint on the user's behalf, or via a compromised component within the same environment.

What is the safest general fix pattern for this class of issue?

The most robust fix pattern is to stop treating untrusted content as HTML and instead encode it for its output context, while simultaneously enforcing secure Electron defaults. That means emitting messages as text-only or sanitised HTML, avoiding dangerous DOM APIs for dynamic content, and ensuring that renderer processes handling user-influenced data run without Node integration and with context isolation.

Severity:

HIGH RISK

(8.8)

DOM-Based XSS to Code Execution (CWE-79/CWE-78) in SiYuan Desktop Notifications

CVE-2026-41421

Published:

Apr 24, 2026

Status:

Deferred

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-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

Database Compromise and Data Integrity Loss

April 27, 2026

CWE-863

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Privilege Escalation and Unauthorized Session Control

April 27, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS) Leading to Code Execution

CWE:

CWE-78;CWE-79

Impact:

Arbitrary Code Execution in Electron Desktop Environment

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS) Leading to Code Execution

CWE:

CWE-78;CWE-79

Impact:

Arbitrary Code Execution in Electron Desktop Environment

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

DOM-Based XSS to Code Execution (CWE-79/CWE-78) in SiYuan Desktop Notifications

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

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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