CVE-2026-105645 Ghost: Regular Expression Denial of Service in External Media Inliner
An administrator can cause excessive CPU usage and server unresponsiveness via a crafted request to the external media inliner in Ghost CMS.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-105645?
CVE-2026-105645 is a medium-severity denial of service vulnerability in TryGhost Ghost, published on 5 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.
Weakness: CWE-1333
Which versions are affected by CVE-2026-105645?
3 open source packages ship an affected version, including ghost.
| Package | Affected | Fixed in |
|---|---|---|
ghost Bitnami | From 5.37.0 | 6.67.0 |
ghost npm | From 5.37.0 | 6.67.0 |
ghost npm | From 5.37.0 | 6.67.0 |
How do I fix CVE-2026-105645?
Upgrade ghost to 6.67.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-105645 being exploited?
There is no known exploitation of CVE-2026-105645 in the wild and no public exploit code.
Sources
Also known as BIT-ghost-2026-105645, GHSA-9m4w-fmjw-fvjq, MINI-rcfc-2872-qfj8.