CVE-2026-103286 is a privilege escalation vulnerability affecting Ghost versions >=2.21.0 and <6.56.0. The issue resides in the notifications system where low-privilege staff users can exploit improper privilege assignment to gain higher staff roles. This occurs due to missing or inadequate authorization checks during privilege elevation attempts within the notifications functionality.

An attacker with low-privilege staff access can escalate their privileges to higher-privilege staff roles, potentially gaining unauthorized administrative capabilities within the Ghost platform. This could lead to unauthorized changes, data exposure, or other administrative actions.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict low-privilege staff user access and monitor for suspicious privilege escalation attempts.