Is CVE-2026-105677 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105677 being exploited in the wild.

How severe is CVE-2026-105677?

High severity, with a CVSS score of 7.2, published 5 October 2026.

Which products and versions are affected?

Ghost 6.10.3 to 6.64.0; ghost (npm) >= 6.10.3, < 6.64.0.

Is there a fix for CVE-2026-105677?

Yes: fixed in 6.64.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-105677 attacked?

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

Am I affected by CVE-2026-105677?

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-2026-105677: Ghost arbitrary code execution in theme translation loading

Q: Is there a fix for CVE-2026-105677?

Yes: fixed in 6.64.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-105677 attacked?

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

Q: Am I affected by CVE-2026-105677?

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-2026-105677 · Severity: high · CVSS 7.2 · Published 2026-10-05

Ghost is a Node.js content management system used to power blogs and websites. Versions 6.10.3 through 6.64.0 contain a vulnerability in how theme translation files are loaded that allows authenticated administrators to execute arbitrary code on the server by uploading a malicious theme. This could lead to complete compromise of the hosting server.

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

Quick answers

Is CVE-2026-105677 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105677 being exploited in the wild.
How severe is CVE-2026-105677?: High severity, with a CVSS score of 7.2, published 5 October 2026.
Which products and versions are affected?: Ghost 6.10.3 to 6.64.0; ghost (npm) >= 6.10.3, < 6.64.0.
Is there a fix for CVE-2026-105677?: Yes: fixed in 6.64.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105677 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105677?: 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

Fixed in: 6.64.0

Technical details

The vulnerability exists in Ghost's theme translation file loading mechanism, which fails to properly validate or sanitize translation files before processing them. An authenticated administrator with theme management capabilities can craft a malicious theme with a specially crafted translation file to achieve arbitrary code execution on the server. The fix in version 6.64.0 refactors the @tryghost/i18n module to use a single TypeScript ESM source with proper validation.

Affected products

Ghost Ghost 6.10.3 to 6.64.0

Identifiers

CVE-2026-105677
GHSA-jj74-hc2q-xrvm

Timeline

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

References

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