IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification (CVE-2026-78365) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-78365

IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification

Answer in brief

CVE-2026-78365 records a Unknown severity vulnerability in IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification. The current sources do not mark it as known exploited. The current feed maps Roskus/Prospero Flow CRM (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 24, 2026Updated Aug 24, 2026Source checked Aug 24, 2026First seen by HOL Aug 24, 2026Material review Aug 24, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Roskus/Prospero Flow CRM (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Roskus/Prospero Flow CRMgeneric	>=4.0.0 <5.3.2	5.3.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Roskus/Prospero Flow CRM.
Review the reported fix. Update Roskus/Prospero Flow CRM to 5.3.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 24, 2026

Sources and claim methodology

Upstream source description

Authorization Bypass Through User-Controlled Key in the supplier API in Roskus Prospero Flow CRM 4.0.0 through 5.3.1 allows any authenticated user to read and modify another company's supplier record, and to reassign it to their own company, via a PUT request to /api/supplier/{id} setting company_id in the body.

Quoted source text, attributed separately from HOL analysis.