CVE-2026-5749: Fullstep

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

Inadequate access control in the registration process in Fullstep V5, which could allow unauthenticated users to obtain a valid JWT token with which to interact with authenticated API resources. Successful exploitation of this vulnerability could allow an unauthenticated attacker to compromise the confidentiality of the affected resource, provided they have a valid token with which to interact with the API.

Affected products

• Fullstep Fullstep: version 5 only

Published 2026-04-22. Last modified 2026-06-17.