{"id":"CVE-2026-77759","summary":"IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records","details":"Authorization Bypass Through User-Controlled Key in the transaction API in Roskus Prospero\nFlow CRM 5.0.0 through 5.3.5 allows an authenticated user to read the transactions of other\ncompanies on the same instance via an incremented identifier in GET /api/transaction/{id},\nwhich is resolved without company scoping and without any permission check.","modified":"2026-09-03T03:30:42.250374653Z","published":"2026-08-21T11:29:43.550Z","database_specific":{"cna_assigner":"Secur0","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77759.json","unresolved_ranges":[{"extracted_events":[{"introduced":"5.0.0"},{"fixed":"5.3.6"}],"source":"AFFECTED_FIELD"},{"source":"CPE_FIELD","extracted_events":[{"introduced":"5.0.0"},{"fixed":"5.3.6"}]},{"extracted_events":[{"introduced":"5.0.0"},{"fixed":"5.3.5"}],"source":"DESCRIPTION"}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77759.json"},{"type":"ADVISORY","url":"https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77759"},{"type":"ADVISORY","url":"https://secur0.com/en/cna/cve-list/cve-2026-77759-idor-missing-authz-prospero-transaction-api"},{"type":"FIX","url":"https://github.com/Roskus/prospero-flow-crm/commit/980c35ac00e419591a8adc2d1dbcc120ea62e273"},{"type":"PACKAGE","url":"https://github.com/Roskus/prospero-flow-crm"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/roskus/prospero-flow-crm","events":[{"introduced":"0"},{"fixed":"980c35ac00e419591a8adc2d1dbcc120ea62e273"},{"fixed":"584f315878b8366244c95fe3cb016b3a63f05db8"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v4.6.0","v2.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77759.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}