Auth Bypass in Roskus Prospero Flow CRM 5.0.05.3.5 Transaction API
CVE-2026-77759 Published on August 21, 2026
IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero
Flow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other
companies on the same instance via an incremented identifier in GET /api/transaction/{id},
which is resolved without company scoping and without any permission check.
Vulnerability Analysis
CVE-2026-77759 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-77759 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-77759
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Affected Versions
Roskus Prospero Flow CRM:- Version 5.0.0 and below 5.3.6 is affected.