CVE-2026-111456: Candlepin: consumer certificate can register systems in another organization
A missing authorization check has been found in ConsumerResource.setupOwner() function of consumer registration module in the Candlepin package. The registration method checks permission to create a consumer only when the caller is a user. A consumer that authenticates with its identity certificate does not go through that check. A low-privileged network attacker or user who has a valid consumer certificate for one organization can register a new consumer in a different organization by supplying that organization's key. The response includes an identity certificate for the new consumer. With that certificate, the attacker can view the target organization's subscription pools. When the organization is not using simple content access, the attacker can attach that organization's entitlements to the new consumer.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker needs a valid consumer identity certificate from any organization and network access to the registration endpoint. The attacker also needs the target organization's key in order to register a consumer in that organization.
What can an attacker do after registering a consumer in another organization?
The registration response provides an identity certificate for the newly created consumer. That certificate can be used to view the target organization's subscription pools; if the organization does not use simple content access, the attacker can also attach the target organization's entitlements to the new consumer.
Does exploitation require an interactive user account or user action?
No. A consumer authenticating with its identity certificate bypasses the permission check that is applied when the caller is a user, and no user interaction is required.