# CVE-2026-19433: Authorization Bypass Through User-Controlled Key in Prospero Flow CRM contact save and vCard export

> Authenticated users can bypass authorization to overwrite and download other companies' contact data via numeric identifiers in Prospero Flow CRM.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Aug 2026
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-8666-8wpq-7c9q

## What is CVE-2026-19433?

CVE-2026-19433 is a high-severity missing authorization vulnerability in Roskus Prospero Flow CRM, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Authorization Bypass Through User-Controlled Key in the contact management component in Roskus Prospero Flow CRM before 5.4.8 allows authenticated users of any company to blindly overwrite the contact data of another company and to download that contact's personal data as a vCard via the contact's numeric identifier, because the save and export operations retrieve the record without constraining the query to the authenticated user's company.

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

## Which versions are affected by CVE-2026-19433?


## How do I fix CVE-2026-19433?

No fix has been published for CVE-2026-19433 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19433 being exploited?

There is no known exploitation of CVE-2026-19433 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19433 and fix it if it is affected.

What it is: CVE-2026-19433 is a high-severity missing authorization vulnerability in Roskus Prospero Flow CRM, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-19433 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-2026-19433/ (Markdown: https://insights.sbomify.com/CVE-2026-19433/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19433
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19433
- OSV: https://osv.dev/vulnerability/CVE-2026-19433

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19433/
Summaries are generated and may contain mistakes; the official description above is the record.