Is CVE-2026-105647 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105647 being exploited in the wild.

How severe is CVE-2026-105647?

Medium severity, with a CVSS score of 4, published 5 October 2026.

Which products and versions are affected?

Ghost 6.54.1 to 6.65.0; ghost (npm) >= 6.54.1, < 6.65.0, SEMVER:introduced=6.54.1,fixed=6.65.0.

Is there a fix for CVE-2026-105647?

Yes. ghost (npm): upgrade to 6.65.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-105647 attacked?

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

Am I affected by CVE-2026-105647?

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-2026-105647: Ghost Node.js CMS SSRF in Webmentions

Q: Is there a fix for CVE-2026-105647?

Yes. ghost (npm): upgrade to 6.65.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-105647 attacked?

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

Q: Am I affected by CVE-2026-105647?

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-2026-105647 · Severity: medium · CVSS 4 · Published 2026-10-05

Ghost is a Node.js-based blogging and content management platform. Versions 6.54.1 through 6.65.0 contain a validation flaw in the Webmentions feature that allows unauthenticated attackers to make HTTP requests to internal network hosts from the Ghost server. While the attacker cannot see the response data, this provides reconnaissance capability and potential access to internal services.

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

Quick answers

Is CVE-2026-105647 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105647 being exploited in the wild.
How severe is CVE-2026-105647?: Medium severity, with a CVSS score of 4, published 5 October 2026.
Which products and versions are affected?: Ghost 6.54.1 to 6.65.0; ghost (npm) >= 6.54.1, < 6.65.0, SEMVER:introduced=6.54.1,fixed=6.65.0.
Is there a fix for CVE-2026-105647?: Yes. ghost (npm): upgrade to 6.65.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105647 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105647?: 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 6.65.0 or later
```
npm install ghost@6.65.0
```

Technical details

A validation issue in Ghost's external request handling, particularly in favicon lookup and oEmbed functionality, fails to properly restrict destination URLs. Unauthenticated users can exploit Webmentions and similar features to make arbitrary HTTP requests to the Ghost server's internal network (SSRF). The fix adds a fetchFirstChunk() method that limits request handling and validates URLs appropriately; the attack requires no special authentication or user interaction.

Affected products

Ghost Ghost 6.54.1 to 6.65.0

Identifiers

CVE-2026-105647
GHSA-322m-ff4g-9vx9

Timeline

2026-10-05: disclosed
2026-09-21: patched

References

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