Home

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.

PUBLISHED Reserved 2026-06-11 | Published 2026-06-24 | Updated 2026-06-24 | Assigner GitHub_M




MEDIUM: 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Problem types

CWE-184: Incomplete List of Disallowed Inputs

CWE-918: Server-Side Request Forgery (SSRF)

Product status

>= 6.0.9, < 6.21.1
affected

References

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

cve.org (CVE-2026-53944)

nvd.nist.gov (CVE-2026-53944)

Download JSON