---
id: CVE-2026-73044
title: >-
  SiYuan versions before v3.7.4 fail to validate or escape table column width
  values, allowing stored cross-site scripting injection into style attributes
summary: >-
  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 br…
severity: critical
cvss: 9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-79
published: '2026-08-15'
updated: '2026-08-15'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73044'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rj55-w3xr-gj62
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-before-stored-cross-site-scripting-via-column-width
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:04.099Z'
epss: 0.00428
epssPercentile: 0.34395
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.