CVE-2026-32591: Red Hat Mirror Registry For Red Hat Openshift

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in Red Hat Quay's Proxy Cache configuration feature. When an organization administrator configures an upstream registry for proxy caching, Quay makes a network connection to the specified registry hostname without verifying that it points to a legitimate external service. An attacker with organization administrator privileges could supply a crafted hostname to force the Quay server to make requests to internal network services, cloud infrastructure endpoints, or other resources that should not be accessible from the Quay application.

Affected products

• Red Hat Mirror Registry For Red Hat Openshift: affected versions not specified; version 2.0 only
• Red Hat Quay: version 3.0.0 only

Published 2026-04-08. Last modified 2026-09-22.