# CVE-2026-5138: Foreman: foreman: information disclosure via improper validation of nested request parameters

> Authenticated users with host-edit permissions can bypass authorization checks to leak sensitive infrastructure metadata from unauthorized organizations.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Jul 2026
- **Updated:** 1 Jul 2026
- **Also known as:** GHSA-47r2-h2mh-qqjp

## What is CVE-2026-5138?

CVE-2026-5138 is a medium-severity missing authorization vulnerability in Redhat Satellite, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in Foreman. An authenticated user with host-edit permissions could exploit a cross-tenant information disclosure vulnerability. This flaw occurs because the taxonomy_scope controller method does not properly validate organization and location IDs from nested request parameters, bypassing existing authorization checks. This allows the user to leak sensitive infrastructure metadata, including subnet topology, IP ranges, gateways, DNS servers, and VLAN IDs, from organizations and locations they are not authorized to access.

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

## Which versions are affected by CVE-2026-5138?

It affects 2 products.


Products: Redhat Satellite, Theforeman Foreman.

## How do I fix CVE-2026-5138?

Apply the vendor's patch.

## Is CVE-2026-5138 being exploited?

There is no known exploitation of CVE-2026-5138 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Satellite

- [CVE-2024-7012](https://insights.sbomify.com/CVE-2024-7012/): Puppet-foreman: an authentication bypass vulnerability exists in foreman (critical 9.8)
- [CVE-2024-7923](https://insights.sbomify.com/CVE-2024-7923/): Puppet-pulpcore: an authentication bypass vulnerability exists in pulpcore (critical 9.8)
- [CVE-2026-96659](https://insights.sbomify.com/CVE-2026-96659/): Foreman: excessive permissions for viewer role on preview (critical 9.1)
- [CVE-2023-0118](https://insights.sbomify.com/CVE-2023-0118/): Foreman: arbitrary code execution through templates (critical 9.1)
- [CVE-2008-2369](https://insights.sbomify.com/CVE-2008-2369/): Hardcoded credentials in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5138 and fix it if it is affected.

What it is: CVE-2026-5138 is a medium-severity missing authorization vulnerability in Redhat Satellite, published on 1 Jul 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-2026-5138 in the wild and no public exploit code.

Affected product: Redhat Satellite. 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-2026-5138/ (Markdown: https://insights.sbomify.com/CVE-2026-5138/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5138
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5138
- OSV: https://osv.dev/vulnerability/CVE-2026-5138

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5138/
Summaries are generated and may contain mistakes; the official description above is the record.