CVE-2026-107203
Description
An incorrect authorization flaw has been found in network interface handling in the Foreman package. The domain and subnet interface API checks only that the caller holds a host permission. It does not apply the search limit on that permission, so the request is answered from every interface on the domain or subnet. A low-privileged network attacker or user must already be allowed to view some hosts and to view a domain or subnet shared with other hosts. They can request that domain or subnet's interfaces. The response includes interface records of hosts they are not allowed to view. If the attacker or user is also allowed to edit some hosts, they can submit a change to one of those interfaces. The interface is then saved with that change.
Statement
Red Hat Product Security has rated this vulnerability with a Moderate security impact. This vulnerability affects Foreman's network interface handling.
The caller needs an account with a search-limited host permission and permission to view that domain or subnet. That account is not an unrestricted administrator. Hence, Low Privileges are required.
With successful exploitation, the caller can read interface fields for hosts outside their search, including the name, addresses, MAC address, FQDN, and host name. The response does not include the BMC password. With a search-limited edit permission, the caller can change interface fields on those hosts, such as the IPv4 address. The change is limited to interface records. It does not grant control of Foreman.
The vulnerable code was introduced in Foreman 1.7.0 when domain and subnet nested interface routes were added. All Foreman versions from 1.7.0 onward contain this code. The host-nested interface route was corrected in Foreman 1.12.1 and 1.11.4 and is outside of this flaw.
Mitigation
Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. Customers are advised to apply the relevant security updates when they become available.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.4 | N/A | 5.4 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | Low | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Acknowledgements
Red Hat would like to thank Wenhao Wu (Southeast University) for reporting this issue.
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