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

Quick assessment

Affected
kepano defuddle
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Defuddle 是一个用于清理 HTML 页面的工具。在版本 0.19.1 之前，其站点提取器（site extractors）在将页面提取出的图片的 alt 和 src 属性值、og:image 属性值以及视频描述等信息插入到 HTML 字符串时，未进行符合上下文的适当转义；同时，buildExtractorResponse() 函数直接返回了该 contentHtml 内容，而未经过主处理管线中基于 DOM 的 sanitization（净化/消毒）处理。受影响的代码路径包括 src/extractors/x

CVSS 8.2 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
kepano defuddle < 0.19.1 affected
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I. Basic Information for CVE-2026-61824

Vulnerability Information
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Vulnerability Title
Defuddle: XSS via unescaped attribute interpolation in site extractors
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kepano defuddle < 0.19.1 -

II. Public POCs for CVE-2026-61824

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7744 chars
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III. Intelligence Information for CVE-2026-61824

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Patches & Fixes for CVE-2026-61824 (2)

Vendor Advisories for CVE-2026-61824 (1)

Vendor Pages for CVE-2026-61824 (1)

IV. Related Vulnerabilities

Same product: defuddle
Same vendor: kepano
Same weakness: CWE-79

V. Comments for CVE-2026-61824

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