Read the docs
TI-2026-23659 Aliases CVE-2026-30830GHSA-5mq8-78gm-pjmq

Defuddle: XSS via unescaped string interpolation in _findContentBySchemaText image tag

Priority MEDIUM 44CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00292 21st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed defuddle (kepano): 0.9.0defuddle (npm): 0.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kepanodefuddlebefore 0.9.00.9.0Patch availableCNA
—defuddle (npm)before 0.9.00.9.0Patch availableGHSA-5mq8-78gm-pjmq
  • defuddle Vendorkepano Affected before 0.9.0 Fixed in 0.9.0 Patch available CNA
  • defuddle (npm) Vendor— Affected before 0.9.0 Fixed in 0.9.0 Patch available GHSA-5mq8-78gm-pjmq

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kepano:defuddle:*:*:*:*:*:node.js:*:*before 0.9.0Vulnerablekepano
  • cpe:2.3:a:kepano:defuddle:*:*:*:*:*:node.js:*:* Versions before 0.9.0 Vulnerable ·kepano

Remediation

  • Fix · CNA defuddle (kepano) Fixed in 0.9.0
  • Fix · GHSA-5mq8-78gm-pjmq defuddle (npm) Fixed in 0.9.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-30830
  2. 2026-10-03 Alias added: GHSA-5mq8-78gm-pjmq

References

Exploit 1

Patch 1

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences