VULNERABILITY INTELLIGENCE

CVE-2026-53944

CVSS score5.8 MEDIUM

EPSS probability0.33%

CISA KEVNot currently listed

Published2026-06-24

Last modified2026-10-25

Description

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1…