SB2026073062 - Authorization bypass through user-controlled key in Ghost

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Main Vulnerability Database SB2026073062

SB2026073062 - Authorization bypass through user-controlled key in Ghost

Published: July 30, 2026

Security Bulletin ID SB2026073062
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Authorization bypass through user-controlled key (CVE-ID: CVE-2026-59817)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to obtain paid gift memberships for a minimal payment.

The vulnerability exists due to authorization bypass through a user-controlled key in Ghost's public donation checkout flow when processing donation checkout requests. A remote attacker can submit a crafted checkout request to obtain paid gift memberships for a minimal payment.

No customer or member data is exposed, and the issue cannot be used to steal money from a site or its members.


Remediation

Install update from vendor's website.

References