CVE-2026-59236 PUBLISHED

Authorization Bypass Through User-Controlled Key (CWE-639) in the Excel import handlers (CustomerImport, LeadImport, ProductImport) in Roskus Prospero Flow CRM before 5.14.0 allows a remote, authenticated user of any role or company to create customer, lead, and product records inside another company's tenant via a spreadsheet whose company_id column points to the victim tenant, uploaded to POST /customer/import/excel/save, which maps company_id directly from the file and performs no check that it matches the authenticated user's company.

Upgrade to version 5.14.0 or higher.

• Mario Álvarez Fernández (maalfer) finder
• Thomas O'Neil Álvarez (thomas.pime) finder
• Gustavo Novaro remediation developer
• Xoan M. Otero Jorge analyst
• Cristian Fernández Cornejo analyst
• Secur0 CNA coordinator

• https://github.com/Roskus/prospero-flow-crm/commit/bdd6c9770a7435a45f0411154671b8a3e94dcdaa
• https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.14.0
• https://secur0.com/en/cna/cve-list/cve-2026-59236-authorization-bypass-in-prospero-flow-crm-excel-import-allows-cross-tenant-record-injection

• CWE-639 Authorization bypass through User-Controlled key CWE

• CAPEC-122 Privilege Abuse