CVE-2026-73044

Received Received - Intake

SiYuan Stored XSS via Table Column Width Injection

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: VulnCheck

Description

SiYuan versions before v3.7.4 fail to validate or escape table column width values, allowing stored cross-site scripting injection into style attributes. Attackers can inject malicious payloads through the setAttrViewColWidth API that break out of style attributes and inject event handlers on every table cell, executing arbitrary code in the Electron renderer with Node integration enabled.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-15

Last Modified

2026-08-15

Generated

2026-08-16

AI Q&A

2026-08-16

EPSS Evaluated

N/A

NVD

CVE-2026-73044

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

SiYuan versions before v3.7.4 have a flaw where table column width values are not properly validated or escaped. This allows attackers to inject malicious scripts through the setAttrViewColWidth API, which can execute arbitrary code in the Electron renderer due to Node integration being enabled.

Detection Guidance

This vulnerability involves stored cross-site scripting in SiYuan versions before v3.7.4 through improperly validated table column width values. Detection requires checking SiYuan version and inspecting for malicious payloads in table attributes. No specific commands are provided in the context.

Impact Analysis

This vulnerability allows attackers to inject and execute malicious scripts in your SiYuan application. If you use SiYuan with Node integration enabled, attackers could steal sensitive data, manipulate content, or take control of your application through crafted table column widths.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations using affected SiYuan versions may face compliance violations and potential legal consequences.

Mitigation Strategies

Immediately upgrade SiYuan to version v3.7.4 or later to address the vulnerability. Disable Node integration in the Electron renderer if enabled. Review and sanitize any user-provided table data for malicious payloads.

Hi! I’m here to help you understand CVE-2026-73044. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70