CVE-2026-104411 — TryGhost
HIGHCVE-2026-104411 is a high-severity (CVSS 7.3) Cross-site Scripting (XSS) vulnerability. No vendor fix is recorded yet; mitigation options are listed below.
Ghost from 6.22.1 before 6.64.0 contains a stored cross-site scripting vulnerability that allows staff users to host scripts by uploading files served with extension-derived content…
Description
Ghost from 6.22.1 before 6.64.0 contains a stored cross-site scripting vulnerability that allows staff users to host scripts by uploading files served with extension-derived content types on the default local storage adapter. Attackers can upload script-bearing files to the site's domain to compromise other staff users' admin sessions.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-104411 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2026-104411 in your dependencies?
Find it across , including transitive dependencies.