# CVE-2026-111456: Candlepin: consumer certificate can register systems in another organization

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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.

## Remediation

- workaround: There is no configuration switch that stops a consumer certificate from calling registration while leaving normal consumer check-ins working. Restricting which clients can reach the Candlepin port limits who can attempt the call, and it does not stop a client that already has a valid consumer certificate and is allowed to use the API. Customers are advised to apply the relevant security updates when they become available. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Satellite 6 (candlepin): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-111456 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2553939 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-111456; retrieved 2026-11-12; source updated 2026-11-12

Revision: f38c30b270f7b63145414a71609f4584e6025b227fb8cd48c7aa175735d4064e

Canonical: https://y2.dev/cve/CVE-2026-111456

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