Kepano Defuddle up to 0.19.0 Site Extractors x-article.ts buildExtractorResponse cross site scripting

Summaryinfo

A vulnerability was found in Kepano Defuddle up to 0.19.0. It has been classified as problematic. The impacted element is the function buildExtractorResponse of the file src/extractors/x-article.ts of the component Site Extractors. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2026-61824. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Kepano Defuddle up to 0.19.0. This affects the function buildExtractorResponse of the file src/extractors/x-article.ts of the component Site Extractors. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-61824 since 07/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 0.19.1 eliminates this vulnerability.

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Productinfo

Vendor

• Kepano

Name

• Defuddle

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19.0

Website

• Product: https://github.com/kepano/defuddle/

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