CVE-2026-53948
CVE-2026-53948 · Ghost: File Upload Content-Type Spoofing
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.21.1.
CVSS 5.4 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node