CVE-2026-104411: Ghost 6.22.1 before 6.64.0 Stored XSS via Local Storage File Uploads

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-79

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.

Affected products

TryGhost Ghost: from 6.22.1 before 6.64.0 — fixed in 6.64.0

How to fix

Upgrade to a fixed version: TryGhost Ghost 6.64.0. Check the vendor advisory for mitigations.

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-gfjp-2p8f-94qv
https://www.vulncheck.com/advisories/ghost-6.22.1-before-6.64.0-stored-xss-via-local-storage-file-uploads

Get alerted when CVE-2026-104411 or the next vulnerability affects your stack