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