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CVE-2026-30830

Medium

Description

Defuddle cleans up HTML pages. Prior to version 0.9.0, the _findContentBySchemaText method in src/defuddle.ts interpolates image src and alt attributes directly into an HTML string without escaping. An attacker can use a " in the alt attribute to break out of the attribute context and inject event handler. This issue has been patched in version 0.9.0.

SeverityMedium
CVSS6.1
Exploit probability—
ProductKepano Defuddle
PublishedMar 7, 2026
First seenMar 7, 2026
Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update
  • kepano defuddle0.9.0 or later
  • defuddle0.9.0 or later

Affected products

ProductAffected versionsFixed in
kepano defuddlev < 0.9.00.9.0
defuddlenpmv < 0.9.00.9.0

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