Auth bypass in Fullstep
CVE-2026-5750
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.).
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
EPSS exploit prediction
EPSS: 0.004 (26.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Fullstep — versions 5, 5.30.07