CVE-2026-105677: Ghost: Remote Code Execution via Theme Translation Files
Impact
A vulnerability in how Ghost loads theme translation files allowed an authenticated Administrator to execute arbitrary code on the server via a crafted theme.
Vulnerable versions
This vulnerability is present in Ghost from v6.10.3 up to v6.64.0.
Patches
v6.64.0 contains a fix for this issue.
How to update
For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.
If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.
References
Ghost thanks Miguel Segovia Gil of KPMG, Alemmi, and Tomer-PL for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email us at security@ghost.org.
Other sources
Ghost is a Node.js content management system. From 6.10.3 until 6.64.0, a vulnerability in how Ghost loads theme translation files allowed an authenticated Administrator to execute arbitrary code on the server via a crafted theme. This issue is fixed in version 6.64.0.
— NVD
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/ghostto a version that resolves this vulnerability.Fixed in 6.64.0 - Upgrade
Upgrade
Ghostto a version that resolves this vulnerability.Fixed in 6.64.0
Event History
Frequently Asked Questions
Which Ghost installations are affected?
Ghost versions from 6.10.3 up to, but not including, 6.64.0 are affected. The issue is fixed in Ghost 6.64.0.
What access does an attacker need to exploit this issue?
An attacker must already be authenticated as a Ghost Administrator and be able to supply a crafted theme. Exploitation does not require user interaction and can result in arbitrary code execution on the server.
What should teams do if they cannot immediately upgrade?
Limit and review Ghost Administrator access, especially accounts able to upload or manage themes. Do not install untrusted themes, because the vulnerable behavior is triggered through crafted theme translation files.