CVE-2026-30830

MEDIUM

defuddle < 0.9.0 - Cross-Site Scripting via Image Alt Attribute

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 6.1
EPSS 0.0025
EPSS Percentile 16.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
kepano/defuddle < 0.9.0
npm/defuddle 0 - 0.9.0npm
Published Mar 07, 2026
Tracked Since Mar 07, 2026