CVE-2026-105648 Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
Unauthenticated attackers can bypass private IP filtering to make limited internal HTTP requests in specific network configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-105648?
CVE-2026-105648 is a medium-severity server-side request forgery vulnerability in TryGhost Ghost, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-105648?
3 open source packages ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 6.0.9 | 6.65.0 |
ghost npm | From 6.0.9 | 6.65.0 |
ghost npm | From 6.0.9 | 6.65.0 |
How do I fix CVE-2026-105648?
Upgrade ghost to 6.65.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-105648 being exploited?
There is no known exploitation of CVE-2026-105648 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-105648, GHSA-r7f2-6fj8-6fg2, MINI-f5xq-mxxc-8fqc.