CVE-2026-5750 Insecure direct object reference (IDOR) vulnerability in Fullstep
Authenticated users can access and modify other users' personal data and documents via insecure direct object references in the registration API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5750?
CVE-2026-5750 is a high-severity missing authorization vulnerability in Fullstep, published on 22 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.).
Weakness: CWE-639
Which versions are affected by CVE-2026-5750?
How do I fix CVE-2026-5750?
No fix has been published for CVE-2026-5750 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-5750 being exploited?
There is no known exploitation of CVE-2026-5750 in the wild and no public exploit code.
Sources
Also known as GHSA-27hq-xp89-25mq.