CVE-2026-5750: Fullstep

High severity, CVSS 7.6. EPSS: 0.4% chance of exploitation in the next 30 days.

An insecure direct object reference (IDOR) vulnerability in the Fullstep V5 registration process allows authenticated users to access data belonging to other registered users through various vulnerable authenticated resources in the application. The vulnerable endpoints result from: '/api/suppliers/v1/suppliers//false' to list user information; and '/#/supplier-registration/supplier-registration//2' to update your user information (personal details, documents, etc.).

Affected products

• Fullstep Fullstep: version 5 only

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