CVE-2026-32591

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.

What this means for your business

It affects Redhat Mirror Registry For Red Hat Openshift. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network, with an administrator login, but only after tricking someone into an action such as opening a file or a link.

What to do

1Check whether your company or your suppliers run Redhat Mirror Registry For Red Hat Openshift, and which version. The affected versions are listed further down this page.
2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

Check if you’re exposed Book a call

Scoring

CVSS: 5.2 (v3.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N
Weakness: CWE-918
Assigned by: secalert@redhat.com

Dates

Published: 2026-04-08
Last modified: 2026-09-10
Sources: NVD

Affected products

Redhat Mirror Registry For Red Hat Openshiftall versions, 2.0
Redhat Quay3.0.0

As listed in the NVD configuration data. Not a statement about your estate.