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Vulnerability record · CVE-2026-61824 · published 21 August 2026

CVE-2026-61824: Cross-site scripting vulnerability

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.

8.2 CVSS 3.1 High EPSS 0.41% · top 67.4% CWE-79 · Cross-site scriptingCWE-116 · CWE-116 Received
8.2CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
24 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-61824), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.