CVE-2026-111456
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Missing Authorization Check in Candlepin Consumer Registration

Publication date: 2026-11-12

Last updated on: 2026-11-12

Assigner: redhat-SADP

Description
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.

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Meta Information

Published
2026-11-12
Last Modified
2026-11-12
Generated
2026-11-12
AI Q&A
2026-11-12
EPSS Evaluated
N/A
NVD
CVE-2026-111456
EUVD
EUVD-2026-124671

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Red Hat Red Hat Satellite 6 *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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Executive Summary

This vulnerability is a missing authorization check in the ConsumerResource.setupOwner() function of the consumer registration module in the Candlepin package. It allows a low-privileged attacker with a valid consumer certificate for one organization to register a new consumer in a different organization by supplying that organization's key. The attacker receives an identity certificate for the new consumer, enabling them to view the target organization's subscription pools and attach its entitlements if simple content access is not in use.

Detection Guidance

Check Candlepin server logs for unauthorized consumer registrations from unexpected organizations. Look for multiple registrations using the same consumer certificate across different organizations. Review subscription pool access logs for unusual activity.

Impact Analysis

An attacker could exploit this to access another organization's subscription pools and entitlements, potentially leading to unauthorized resource consumption or data exposure. This could disrupt services or allow the attacker to perform actions on behalf of the targeted organization.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements such as GDPR (data protection) or HIPAA (health information privacy). Unauthorized access to subscription pools or entitlements may result in data breaches or improper resource usage, posing legal and regulatory risks.

Mitigation Strategies

Apply available security updates for Candlepin and Red Hat Satellite immediately. Monitor consumer registrations closely and revoke any suspicious certificates. Temporarily restrict consumer certificate-based registrations if updates are not immediately available.

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