# CVE-2026-78365: IDOR and missing authorization in Prospero Flow CRM supplier API allows cross-tenant read and modification

> Authenticated users can read and modify other companies' supplier records by manipulating the company_id in API requests.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-4hh4-jwxc-xpmf

## What is CVE-2026-78365?

CVE-2026-78365 is a critical missing authorization vulnerability in Roskus Prospero Flow CRM, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-862 (Missing Authorization), CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-78365?


## How do I fix CVE-2026-78365?

No fix has been published for CVE-2026-78365 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78365 being exploited?

There is no known exploitation of CVE-2026-78365 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78365 and fix it if it is affected.

What it is: CVE-2026-78365 is a critical missing authorization vulnerability in Roskus Prospero Flow CRM, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-78365 in the wild and no public exploit code.

Affected product: Roskus Prospero Flow CRM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-78365/ (Markdown: https://insights.sbomify.com/CVE-2026-78365/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78365
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78365
- OSV: https://osv.dev/vulnerability/CVE-2026-78365

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78365/
Summaries are generated and may contain mistakes; the official description above is the record.