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[ CVE-2026-105648 · Published 5 Oct 2026 ]

Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses

CVSS 4.0 EPSS <1%Fix available

[ Description ]Official description

Ghost is a Node.js content management system. From 6.0.9 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network on some network configurations. A successful attack would not result in any response data being returned. This issue is fixed in version 6.65.0.

[ Fixes ]Fixes and patches

  • ghost 6.65.0Fixed version · GitHub Advisories · npm package ghost: upgrade to 6.65.0 or later (affected >= 6.0.9, < 6.65.0)

[ Packages ]Affected open-source packages

[ References ]References