CVE-2026-53944 — Ghost: Private IP filtering bypass to make server-side requests to internal services

CVE-2026-53944

Ghost: Private IP filtering bypass to make server-side requests to internal services PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
TryGhost / Ghost	affected >= 6.0.9, < 6.21.1

CWE

CWE-184, CWE-918

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.