CVE-2026-30830

MEDIUM
2026-03-07 [email protected] GHSA-5mq8-78gm-pjmq
6.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Mar 11, 2026 - 18:50 vuln.today
Public exploit code
Patch Released
Mar 11, 2026 - 18:50 nvd
Patch available
CVE Published
Mar 07, 2026 - 06:16 nvd
MEDIUM 6.1

Tags

XSS Defuddle

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.

Analysis

Defuddle versions prior to 0.9.0 fail to properly escape image attributes in HTML processing, allowing attackers to inject malicious event handlers through specially crafted alt text containing quote characters. Public exploit code exists for this cross-site scripting vulnerability. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: +20

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CVE-2026-30830 vulnerability details – vuln.today
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