medium4.0
CVE-2026-105648
Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | ghost | >= 6.0.9, < 6.65.0 | 6.65.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-r7f2-6fj8-6fg2
- https://github.com/TryGhost/Ghost/security/advisories/GHSA-r7f2-6fj8-6fg2
- https://nvd.nist.gov/vuln/detail/CVE-2026-105648
- https://github.com/TryGhost/Ghost/pull/30917
- https://github.com/TryGhost/Ghost/commit/20d3f792bf4a7c349ee56b746a067550d8684ff5
- https://github.com/TryGhost/Ghost/releases/tag/v6.65.0