CVE-2026-61824 Defuddle: XSS via unescaped attribute interpolation in site extractors
An attacker can inject malicious scripts into extracted HTML via unescaped attributes, leading to code execution when rendered by downstream applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-61824?
CVE-2026-61824 is a high-severity cross-site scripting vulnerability in kepano defuddle, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-61824?
2 open source packages ship an affected version, including defuddle.
| Package | Affected | Fixed in |
|---|---|---|
defuddle npm | All versions | 0.19.1 |
defuddle npm | All versions | 0.19.1 |
How do I fix CVE-2026-61824?
Upgrade defuddle to 0.19.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-61824 being exploited?
There is no known exploitation of CVE-2026-61824 in the wild and no public exploit code.
Sources
Also known as GHSA-jg4p-g6xj-4qmf.