CVE-2026-53945 Ghost: Server-side request forgery via DNS rebinding in external request handling
Attackers can bypass private-IP checks via DNS rebinding to force the Ghost server to access internal network resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53945?
CVE-2026-53945 is a medium-severity server-side request forgery vulnerability in TryGhost Ghost, published on 24 Jun 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 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. This vulnerability is fixed in 6.21.1.
Which versions are affected by CVE-2026-53945?
3 open source packages ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 6.0.9 | 6.21.1 |
ghost npm | From 6.0.9 | 6.21.2 |
ghost npm | From 6.0.9 | 6.21.2 |
How do I fix CVE-2026-53945?
Upgrade ghost to a fixed version for your release line: 6.21.1 or 6.21.2.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-53945 being exploited?
There is no known exploitation of CVE-2026-53945 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-53945, GHSA-ch52-px8q-f22j.