Concurrency Issue in Ghost Product Leading to Unauthorized Account Creation
CVE-2026-103282

5.3MEDIUM

Key Information:

Vendor

Tryghost

Status
Ghost
Vendor
CVE Published:
1 October 2026

What is CVE-2026-103282?

Ghost versions up to 0.5.0, prior to 6.23.0, are affected by a concurrency issue within the invitation acceptance process. This flaw allows attackers to exploit a race condition where multiple accounts can be created using a single invitation token. By submitting simultaneous requests with the same token, an attacker can create duplicate user accounts, posing a significant risk to user management and site integrity.

Affected Version(s)

Ghost 0.5.0 < 6.23.0

References

https://github.com/TryGhost/Ghost/security/advisories/GHS...
vendor-advisory
https://www.vulncheck.com/advisories/ghost-0.5.0-before-6...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.