CVE-2026-75838 (Medium) detected in dompurify-3.4.1.tgz

[mend-bolt-for-github]

CVE-2026-75838 - Medium Severity Vulnerability

Vulnerable Library - dompurify-3.4.1.tgz

DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It's written in JavaScript and works in all modern browsers (Safari, Opera (15+), Internet Explorer (10+), Firefox and Chrome - as well as almost anything else usin

Library home page: https://registry.npmjs.org/dompurify/-/dompurify-3.4.1.tgz

Sample Path to Dependency File: /ui/package.json

Path to vulnerable library: /ui/node_modules/.pnpm/dompurify@3.4.1/node_modules/dompurify/package.json

Dependency Hierarchy:

• @⁠postgres.ai/ce-4.0.3.tgz (Root Library)
  • react-4.7.0.tgz
    • monaco-editor-0.55.1.tgz
      • ❌ dompurify-3.4.1.tgz (Vulnerable Library)

Found in base branch: master

Vulnerability Details

DOMPurify before 3.4.13 contains a cross-site scripting vulnerability in IN_PLACE sanitization where element-removal hooks fail to neutralize detached subtrees. Attackers can supply HTML with event handlers on descendant elements that execute after sanitization completes, even though the returned root appears clean.

Publish Date: 2026-08-18

URL: CVE-2026-75838

CVSS 3 Score Details (5.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-55q2-fjhq-7xh7

Release Date: 2026-08-18

Fix Resolution: dompurify - 3.4.13,dompurify - 3.4.13

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