CVE-2026-105651: Ghost: Stored XSS via Bookmark Card Images
Impact
When creating a bookmark card, Ghost could store non-image files fetched from an external website as bookmark icons or thumbnails. This allowed any staff user, including Contributors, to host arbitrary HTML on the site's domain, possibly resulting in compromise of other staff users' admin sessions.
Vulnerable versions
This vulnerability is present in Ghost from v5.94.0 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 Thai Son Dinh of VinSOC Labs and 白墨 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 5.94.0 until 6.64.0, when creating a bookmark card, Ghost could store non-image files fetched from an external website as bookmark icons or thumbnails. This allowed any staff user, including Contributors, to host arbitrary HTML on the site's domain, possibly resulting in compromise of other staff users' admin sessions. This issue is fixed in version 6.64.0.
— MITRE
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 deployments are affected?
Ghost versions from 5.94.0 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 needs a staff account. Contributors are included, so exploitation does not require administrator-level privileges.
How could this affect other users?
A staff user could cause arbitrary HTML fetched from an external website to be stored on the Ghost site's domain as a bookmark icon or thumbnail. This could enable stored cross-site scripting and potentially compromise other staff users' admin sessions.
Are sites affected by default?
The vulnerable behavior is triggered when creating a bookmark card and using externally fetched content for its icon or thumbnail. The provided information does not indicate any additional configuration requirement.