High 8.7Published Aug 21, 2026

CVE-2026-77759IDOR and missing authorization in the Prospero Flow CRM transaction API allow cross-tenant reading of financial records

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects Roskus Prospero Flow CRM. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Roskus Prospero Flow CRM

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Secur0
NVD analysis: Deferred
Record last updated: Aug 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Roskus Prospero Flow CRM roskus:prospero_flow_crm (from the name)	from 5.0.0 before 5.3.6	CNA record

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-description, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.