CVE-2026-78365 IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification
Authenticated users can read and modify other companies' supplier records by manipulating the company_id in API requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78365?
CVE-2026-78365 is a critical missing authorization vulnerability in Roskus Prospero Flow CRM, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authorization Bypass Through User-Controlled Key in the supplier API in Roskus Prospero Flow CRM 4.0.0 through 5.3.1 allows any authenticated user to read and modify another company's supplier record, and to reassign it to their own company, via a PUT request to /api/supplier/{id} setting company_id in the body.
Which versions are affected by CVE-2026-78365?
How do I fix CVE-2026-78365?
No fix has been published for CVE-2026-78365 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-2026-78365 being exploited?
There is no known exploitation of CVE-2026-78365 in the wild and no public exploit code.
Sources
Also known as GHSA-4hh4-jwxc-xpmf.