Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M

CVE-2026-61824Defuddle: XSS via unescaped attribute interpolation in site extractors

High 8.2

In plain English

A high-severity cross-site scripting in defuddle from kepano. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)0.4%top 64.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	defuddle	0.19.1	GHSA-jg4p-g6xj-4qmf

Affected products (as reported)

Vendor	Product	Versions
kepano	defuddle	< 0.19.1

Weakness: CWE-79, CWE-116 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References

https://github.com/kepano/defuddle/security/advisories/GHSA-jg4p-g6xj-4qmf x_refsource_CONFIRM
https://github.com/kepano/defuddle/pull/326 x_refsource_MISC
https://github.com/kepano/defuddle/commit/baf2eaef61d334ef595b28c89e5c5e89e52daf7f x_refsource_MISC
https://github.com/kepano/defuddle/releases/tag/0.19.1 x_refsource_MISC