Is CVE-2026-105646 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105646 being exploited in the wild.

How severe is CVE-2026-105646?

Medium severity, with a CVSS score of 4.9, published 5 October 2026.

Which products and versions are affected?

Ghost 4.0.0 until 6.67.0; ghost (npm) >= 4.0.0, < 6.67.0, SEMVER:introduced=4.0.0,fixed=6.67.0.

Is there a fix for CVE-2026-105646?

Yes. ghost (npm): upgrade to 6.67.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-105646 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-105646?

Check whether you run Ghost or ghost (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-105646: Ghost regex denial of service in content import

Q: Is there a fix for CVE-2026-105646?

Yes. ghost (npm): upgrade to 6.67.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-105646 attacked?

It is attacked over the network, in a web application.

Q: Am I affected by CVE-2026-105646?

Check whether you run Ghost or ghost (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-105646 · Severity: medium · CVSS 4.9 · Published 2026-10-05

Ghost is a Node.js-based content management system used to publish and manage websites and blogs. A maliciously crafted content import file can trigger excessive CPU usage and render the Ghost server unresponsive. An attacker with administrator credentials can exploit this to cause a denial of service.

Technologies: Ghost, ghost (npm). Vendors: Ghost, npm.

Quick answers

Is CVE-2026-105646 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105646 being exploited in the wild.
How severe is CVE-2026-105646?: Medium severity, with a CVSS score of 4.9, published 5 October 2026.
Which products and versions are affected?: Ghost 4.0.0 until 6.67.0; ghost (npm) >= 4.0.0, < 6.67.0, SEMVER:introduced=4.0.0,fixed=6.67.0.
Is there a fix for CVE-2026-105646?: Yes. ghost (npm): upgrade to 6.67.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105646 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105646?: Check whether you run Ghost or ghost (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

ghost (npm): upgrade to 6.67.0 or later
```
npm install ghost@6.67.0
```

Technical details

The vulnerability is a regular expression denial of service (ReDoS) flaw in Ghost's content import handler that processes regex patterns without proper escaping. An authenticated administrator can supply a specially crafted import file that causes catastrophic backtracking in regex evaluation, consuming excessive CPU resources and making the server unresponsive. The fix escapes user-supplied input before constructing regular expressions.

Affected products

Ghost Ghost 4.0.0 until 6.67.0

Identifiers

CVE-2026-105646
GHSA-fwh9-qg68-vxp4

Timeline

2026-10-05: disclosed
2026-09-28: patched

References

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