CVE-2026-105648: Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
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.
References
- github.com/TryGhost/Ghost/commit/20d3f792bf4a7c349ee56b746a067550d8684ff5
- github.com/TryGhost/Ghost/pull/30917
- github.com/TryGhost/Ghost/releases/tag/v6.65.0
- github.com/TryGhost/Ghost/security/advisories/GHSA-r7f2-6fj8-6fg2
- github.com/advisories/GHSA-r7f2-6fj8-6fg2
- nvd.nist.gov/vuln/detail/CVE-2026-105648
Code Behaviors & Features
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