Stored Cross-Site Scripting in Ghost by TryGhost
CVE-2026-104413

8.5HIGH

Key Information:

Vendor

Tryghost

Status
Ghost
Vendor
CVE Published:
2 October 2026

What is CVE-2026-104413?

Versions of Ghost from 5.94.0 prior to 6.64.0 possess a stored cross-site scripting vulnerability. This issue allows contributors and other staff users to exploit the system by hosting arbitrary HTML through bookmark card image fetching. Malicious actors can create bookmark cards that link to non-image files from external websites, causing these files to serve as icons or thumbnails. This behavior can lead to the compromise of admin sessions for other staff members, posing significant security risks.

Affected Version(s)

Ghost 5.94.0 < 6.64.0

Ghost 6.64.0

References

https://github.com/TryGhost/Ghost/security/advisories/GHS...
vendor-advisory
https://www.vulncheck.com/advisories/ghost-5.94.0-before-...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

sondt99
5255fgh
.