Is CVE-2026-105649 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105649 being exploited in the wild.

How severe is CVE-2026-105649?

High severity, with a CVSS score of 7.3, published 5 October 2026.

Which products and versions are affected?

Ghost 4.22.0 to 6.64.x; ghost (npm) >= 4.22.0, < 6.65.0, SEMVER:introduced=4.22.0,fixed=6.65.0.

Is there a fix for CVE-2026-105649?

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-2026-105649 attacked?

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

Am I affected by CVE-2026-105649?

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-2026-105649: Ghost stored XSS via unvalidated SVG thumbnails

Q: Is there a fix for CVE-2026-105649?

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-2026-105649 attacked?

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

Q: Am I affected by CVE-2026-105649?

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-2026-105649 · Severity: high · CVSS 7.3 · Published 2026-10-05

Ghost is a Node.js content management system used to host and publish blogs and websites. In versions 4.22.0 through 6.64.x, staff members including contributors could upload SVG files with misleading file extensions (like .jpg) that bypassed sanitization checks, allowing them to host malicious scripts on the site's domain. This could lead to compromise of other staff members' admin sessions and account takeover.

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

Quick answers

Is CVE-2026-105649 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105649 being exploited in the wild.
How severe is CVE-2026-105649?: High severity, with a CVSS score of 7.3, published 5 October 2026.
Which products and versions are affected?: Ghost 4.22.0 to 6.64.x; ghost (npm) >= 4.22.0, < 6.65.0, SEMVER:introduced=4.22.0,fixed=6.65.0.
Is there a fix for CVE-2026-105649?: 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-2026-105649 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105649?: 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

SVG media thumbnails and images were stored without sanitization when uploaded with non-SVG file extensions, failing to validate file content against declared type. Any staff user, including contributors with limited permissions, could exploit this to host arbitrary scripts on the site domain via path traversal or MIME type confusion. The vulnerability allows stored XSS leading to session hijacking of admin users with higher privileges; it is fixed in version 6.65.0.

Affected products

Ghost Ghost 4.22.0 to 6.64.x

Identifiers

CVE-2026-105649
GHSA-8575-cr6v-7jh4

Timeline

2026-10-05: disclosed
2026-09-21: patched: Fix committed to main branch prior to CVE publication

References

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