CVE-2026-90772
Received Received - Intake

Amundsen Frontend XSS via Unsanitized HTML Descriptions

Publication date: 2026-09-13

Last updated on: 2026-09-13

Assigner: VulnCheck

Description
Amundsen frontend through 4.3.0 renders table, dashboard, and feature descriptions with dangerouslySetInnerHTML without HTML sanitization in ResourceListItem components. Attackers can inject malicious markup like img elements with onerror handlers into descriptions via the metadata service or Elasticsearch, executing JavaScript in every user's browser that views search results.

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Meta Information

Published
2026-09-13
Last Modified
2026-09-13
Generated
2026-09-13
AI Q&A
2026-09-13
EPSS Evaluated
N/A
NVD
CVE-2026-90772
EUVD
EUVD-2026-76993

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
amundsen frontend to 4.3.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This is a stored Cross-Site Scripting (XSS) vulnerability in Amundsen frontend versions up to 4.3.0. It occurs because descriptions are rendered using dangerouslySetInnerHTML without HTML sanitization in ResourceListItem components. Attackers can inject malicious markup like img elements with onerror handlers into descriptions via the metadata service or Elasticsearch. When users view search results, the injected JavaScript executes in their browsers.

Detection Guidance

Check Amundsen frontend logs for suspicious descriptions containing HTML tags like img or script. Inspect Elasticsearch indices for metadata entries with unsanitized HTML in description fields. Use browser developer tools to examine rendered search results for injected scripts.

Impact Analysis

This vulnerability allows attackers to execute arbitrary JavaScript in the browsers of all users who view search results containing the malicious description. This could lead to session hijacking, theft of sensitive data, or defacement of the application. Users with elevated privileges may be particularly targeted.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using affected versions may face compliance violations, legal liabilities, and reputational damage due to potential data breaches.

Mitigation Strategies

Upgrade Amundsen frontend to a patched version. Implement HTML sanitization for all description fields before rendering using libraries like DOMPurify. Sanitize descriptions during data ingestion in the databuilder pipeline before indexing in Elasticsearch.

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