CVE-2026-77759
IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 21, 2026
- Updated
- Aug 21, 2026
- Reserved
- Aug 21, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | Secur0 |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
Prospero Flow CRMRoskus |
|
References
- https://github.com/Roskus/prospero-flow-crm/commit/980c35ac00e419591a8adc2d1dbcc120ea62e273patch
- https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3release-notes
- https://secur0.com/en/cna/cve-list/cve-2026-77759-idor-missing-authz-prospero-transaction-apitechnical-descriptionthird-party-advisory
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