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Vulnerabilities CVE-2026-61824

CVE-2026-61824

High
Open
TLP:CLEAR

Defuddle: XSS via unescaped attribute interpolation in site extractors

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Description

Defuddle cleans up HTML pages. Prior to 0.19.1, site extractors interpolate page-derived image alt and src values, og:image values, and video descriptions into HTML strings without context-appropriate escaping, and buildExtractorResponse() returns this contentHtml without the main pipeline's DOM-based sanitization. The affected paths include src/extractors/x-article.ts, src/extractors/substack.ts, and src/extractors/youtube.ts. A malicious page or attacker-controlled content on a matching domain can inject event-handler attributes or javascript URLs that execute when a victim or downstream application renders the extracted HTML. This issue is fixed in version 0.19.1.

Details

CVSS Score
8.2
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Confidence
90%
Published
Aug 21, 2026
Last Modified
Aug 21, 2026
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