CVE-2026-53944CWE-184CWE-918

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

Medium · published June 24, 2026

CVSS v3.1
5.8
EPSS
0%
Percentile
24.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00329 · 24.7th percentile
Weaknesses
CWE-184 · Incomplete List of Disallowed Inputs; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-06-24T18:10Z
EPSS history
Timeline
  • 24 JUN 18:10Z
    Ghost: Private IP filtering bypass to make server-side requests to internal services
    cvelistv5