CVE-2026-107203 Red Hat CVE debrief

Who should care

Defenders managing Foreman instances, especially those with multiple users or interfaces, should assess exposure and prioritize remediation. Network administrators and security teams responsible for Foreman deployments should review user permissions and interface access controls.

Why it matters

CVE-2026-107203 is a medium-severity vulnerability in Foreman's domain and subnet interface API, allowing low-privileged users to access unauthorized interface records and make changes to interfaces without proper authorization. Defenders managing Foreman instances should assess exposure, prioritize remediation, and restrict access to sensitive interfaces and hosts.

• Low-privileged users can access unauthorized interface records.
• Interface changes can be made by users without proper authorization.
• Defenders need to review and update user permissions and interface access controls.
• Remediation priority is medium, with a focus on restricting access and monitoring interface changes.

Technical summary

The domain and subnet interface API in Foreman checks only for host permission but does not apply search limits. This allows low-privileged users to access interface records of hosts they are not authorized to view. If the user also has edit permissions, they can modify these interfaces. The issue arises from the API's failure to enforce search filters associated with the host permission, potentially exposing sensitive information across different hosts on the same domain or subnet. Defenders should focus on restricting access and monitoring changes.

Defensive priority

Medium priority for defenders managing Foreman instances, especially those with multiple users or interfaces.

Recommended defensive actions

• Review and update permissions for users and interfaces in Foreman instances.
• Restrict access to sensitive interfaces and hosts.
• Monitor interface changes and audit logs for suspicious activity.
• Apply patches or updates provided by the vendor once available.
• Perform an exposure review for Foreman instances in the environment.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details about the incorrect authorization flaw in Foreman's domain and subnet interface API. The NVD entry is currently empty. Defenders should verify the affected Foreman instances, review user permissions, and monitor interface changes. Evidence limits suggest focusing on publicly available details from the CVE Program and NVD.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.