Observable discrepancy in Ghost - CVE-2026-53947
Published: July 30, 2026
Vulnerability identifier: #VU140539
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53947
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper access control in the members signin endpoints when handling magic link sign-in requests. A remote attacker can submit an email address to determine whether it belongs to a registered member to disclose sensitive information.
Affected software
Ghost
How to mitigate CVE-2026-53947
Install security update from vendor's website.
Ghost - update to 6.21.1