CVE-2026-104413 Ghost 5.94.0 before 6.64.0 Stored XSS via Bookmark Card Images
Staff users can inject arbitrary HTML via bookmark card images, potentially compromising other staff users' admin sessions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-104413?
CVE-2026-104413 is a high-severity cross-site scripting vulnerability in TryGhost Ghost, published on 2 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Ghost from 5.94.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows staff users, including Contributors, to host arbitrary HTML by abusing bookmark card image fetching. Attackers can create bookmark cards that store non-image files from external websites as icons or thumbnails to compromise other staff users' admin sessions.
Weakness: CWE-79
Which versions are affected by CVE-2026-104413?
How do I fix CVE-2026-104413?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-104413 being exploited?
There is no known exploitation of CVE-2026-104413 in the wild and no public exploit code.
Sources
Also known as GHSA-5pj5-x6hq-mvq7, MINI-24jq-5r3j-pq9j.