CVE-2026-53944: 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…

PriorityP432medium5.8CVSS 3.1

AVNACLPRNUINSCCNILAN

EPSS

0.20%

9.6th percentile

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
tryghost	ghost	—	—

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