CVE-2026-105646: Ghost Package Suffers from Regular Expression Denial of Service in Content Import
Summary
CVE-2026-105646: Ghost: Regular Expression Denial of Service in Content Import. Affects ghost versions >= 4.0.0, < 6.67.0. Fixed in 6.67.0. How to fix ↓
Also tracked for
- ghost · Bitnami
The same CVE-2026-105646 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Ghost is a popular open-source publishing platform designed for creating and managing online content. It is built on Node.js and is known for its simplicity and user-friendly interface. Ghost allows users to create blogs, magazines, and other types of content-driven websites. However, it has been found to be vulnerable to a Regular Expression Denial of Service (ReDoS) attack, which can lead to excessive CPU usage and make the server unresponsive.
Vulnerability Detail
The vulnerability arises from the handling of crafted content import files that exploit regular expressions in Ghost's code. When an attacker with Administrator access uploads a specially crafted file, it can cause the server to consume excessive CPU resources, leading to a denial of service. This vulnerability affects versions of Ghost from v4.0.0 up to v6.65.0, making it critical for users to address it promptly.
How To Fix
Latest published version: 6.72.0 as of 22 Oct 2026
npm install ghost@6.72.0Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
6.67.0
This is the first release that contains the fix.
npm install ghost@6.67.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the content import functionality to trusted administrators only, reducing the risk of exploitation until the update can be applied.
Conclusion
The Regular Expression Denial of Service vulnerability in Ghost poses a significant risk to users running affected versions. It is crucial to update to version 6.67.0 or later to mitigate this risk. Additionally, implementing temporary workarounds can help protect your server until the update is applied.
See every vulnerability recorded for ghost →
FAQ
The vulnerability can lead to excessive CPU usage, causing the Ghost server to become unresponsive.
All users of Ghost versions from v4.0.0 to v6.65.0 are affected by this vulnerability.
You can check your Ghost version by running ghost version in your terminal. If it is between v4.0.0 and v6.65.0, you are vulnerable.
Yes, updating to Ghost version 6.67.0 or later resolves the vulnerability.
Yes, Vulert can monitor your project for open-source vulnerabilities in real-time using just your package-lock.json file. You can also check if your application is affected using the Vulert playground without any signup.
References
Related vulnerabilities
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