What’s Vulnerable › Vulnerabilities

CVE-2026-78365: IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-24 · updated 2026-10-12
• Weakness: CWE-639

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.

Affected products

• Roskus Prospero Flow CRM: from 4.0.0 before 5.3.2 — fixed in 5.3.2

How to fix

Upgrade to a fixed version: Roskus Prospero Flow CRM 5.3.2. Check the vendor advisory for mitigations.

References

• https://github.com/Roskus/prospero-flow-crm/commit/4a52477e6ed66afa436814c80e7bcd68670dd596
• https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3
• https://secur0.com/en/cna/cve-list/cve-2026-78365-idor-supplier-api-cross-tenant-update

Get alerted when CVE-2026-78365 or the next vulnerability affects your stack