# CVE-2026-39384: FreeScout Customer Merge Cross-Mailbox Authorization Bypass

> Attackers can bypass customer visibility restrictions during merge operations, potentially accessing or modifying data across mailboxes.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L`)
- **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:** 7 Apr 2026
- **Updated:** 9 Apr 2026
- **Also known as:** GHSA-j6v9-22vq-53vh

## What is CVE-2026-39384?

CVE-2026-39384 is a high-severity missing authorization vulnerability in freescout-help-desk freescout, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.212, FreeScout does not take the limit_user_customer_visibility parameter into account when merging customers. This vulnerability is fixed in 1.8.212.

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

## Which versions are affected by CVE-2026-39384?

It affects 1 product.


Products: Freescout Freescout.

## How do I fix CVE-2026-39384?

No fix has been published for CVE-2026-39384 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-39384 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39384 exists.

## Other vulnerabilities in freescout-help-desk freescout

- [CVE-2026-28289](https://insights.sbomify.com/CVE-2026-28289/): FreeScout 1.8.206 Patch Bypass for CVE-2026-27636 via Zero-Width Space Character Leads to Remote Code Execution (critical 10.0)
- [CVE-2026-27637](https://insights.sbomify.com/CVE-2026-27637/): FreeScout's Predictable Authentication Token Enables Account Takeover (critical 9.8)
- [CVE-2026-32754](https://insights.sbomify.com/CVE-2026-32754/): FreeScout: Stored XSS via Unescaped Email Template Rendering ({!! $thread->body !!}) (critical 9.3)
- [CVE-2024-29185](https://insights.sbomify.com/CVE-2024-29185/): FreeScout OS Command Injection vulnerability (critical 9.1)
- [CVE-2026-40498](https://insights.sbomify.com/CVE-2026-40498/): FreeScout has Authentication Bypass and Information Disclosure in SystemController via /system/cron (high 8.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-39384 and fix it if it is affected.

What it is: CVE-2026-39384 is a high-severity missing authorization vulnerability in freescout-help-desk freescout, published on 7 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39384 exists.

Affected product: freescout-help-desk freescout. 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-2026-39384/ (Markdown: https://insights.sbomify.com/CVE-2026-39384/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-39384
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-39384
- OSV: https://osv.dev/vulnerability/CVE-2026-39384

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-39384/
Summaries are generated and may contain mistakes; the official description above is the record.