CVE-2026-53944

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

Published Jun 24, 2026 CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wvp2-4qqp-4h3r Ghost: Private IP filtering bypass to make server-side requests to internal services
History
Type Values Removed Values Added
First Time appeared Ghost
Ghost ghost
Vendors & Products Ghost
Ghost ghost
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Ghost: Private IP filtering bypass to make server-side requests to internal services
Weaknesses CWE-184
CWE-918
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 24, 2026, 6:50 PM
Reserved
Jun 11, 2026, 3:50 PM
Status
Deferred
Published
Jun 24, 2026, 7:17 PM
Modified
Oct 25, 2026, 10:10 PM