# CVE-2026-12423: Foreman authentication bypass in /unattended/provision API

Source: https://junglewise.ai/threats/cve-2026-12423-a-flaw-was-found-in-foreman-the-red-hat-satellite-unattended  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-12423 · Severity: high · CVSS 7.5 · Published 2026-10-01

Foreman is an open-source provisioning and configuration management system used to deploy and manage servers at scale. An authentication bypass flaw in the /unattended/provision API endpoint allows an attacker to request a server's kickstart installation template without providing a valid authentication token, potentially enabling unauthorized server provisioning or data exposure.

Technologies: [Red Hat Foreman](https://junglewise.ai/threats/technologies/red-hat-foreman). Vendors: [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## Quick answers

**Is CVE-2026-12423 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12423 being exploited in the wild.

**How severe is CVE-2026-12423?** High severity, with a CVSS score of 7.5, published 1 October 2026.

**Which products and versions are affected?** Red Hat Foreman <UNKNOWN>.

**Is there a fix for CVE-2026-12423?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-12423 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-12423?** Check whether you run Red Hat Foreman at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a semantic logic flaw in host_verifier.rb where the application checks whether a provisioning token exists in the database rather than validating its presence in the HTTP request. An attacker can omit the token from the request URL; if any host is actively provisioning with a valid token in the database, the valid_host_token? method returns true and grants access to sensitive kickstart templates. This is a pre-authentication bypass requiring only network access to the API endpoint.

## Affected products

- Red Hat Foreman <UNKNOWN>

## Timeline

- 2026-10-01: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/errata/RHSA-2026:74503](https://access.redhat.com/errata/RHSA-2026:74503)

## Related threats

- [Foreman authorization bypass in personal access token creation](https://junglewise.ai/threats/cve-2026-86322-a-flaw-was-found-in-foreman-s-api-v2)
- [Foreman incorrect authorization in network interface API](https://junglewise.ai/threats/cve-2026-107203-an-incorrect-authorization-flaw-has-been-found-in-network)
- [Foreman permission filter authorization bypass](https://junglewise.ai/threats/cve-2026-107193-a-flaw-has-been-found-in-permission-filters-in-the-foreman)
- [Foreman foreman-tail command injection via eval](https://junglewise.ai/threats/cve-2026-12542-a-flaw-was-found-in-foreman-the-foreman-tail-utility-is)
- [Foreman template preview SSTI and credential disclosure](https://junglewise.ai/threats/cve-2026-96659-a-flaw-was-found-in-foreman-this-vulnerability-allows-an)