CVE-2026-104412: Ghost 0.5.0 before 6.64.0 Privilege Escalation via Staff Role Assignment

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-06
Weakness: CWE-269

Description

Ghost 0.5.0 before 6.64.0 does not correctly restrict staff role assignment, allowing users with the Editor or Super Editor role to assign their own role to other staff despite lacking permission to do so. An authenticated Editor or Super Editor can promote Author and Contributor users to Editor or Super Editor.

Affected products

TryGhost Ghost: from 0.5.0 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-4pvx-fwjj-8gpc
https://www.vulncheck.com/advisories/ghost-0.5.0-before-6.64.0-privilege-escalation-via-staff-role-assignment

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