CVE-2026-61824

High

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.

SeverityHigh
CVSS8.2
Exploit probability—
ProductDefuddle
PublishedAug 21, 2026
First seenAug 21, 2026

How to fix

Update
  • defuddle0.19.1 or later

Affected products

ProductAffected versionsFixed in
defuddlenpmv < 0.19.10.19.1

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