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OpenAdvisories
Medium · 5.8 CVE-2026-53944 BIT-ghost-2026-53944EUVD-2026-39025GHSA-wvp2-4qqp-4h3r

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

Published Jun 24, 2026 · Updated Jun 24, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
TryGhost Ghost >= 6.0.9, < 6.21.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm ghost >= 6.0.9, < 6.21.1 6.21.1 GHSA-wvp2-4qqp-4h3r

References