CVE-2026-32591 Mirror-registry: quay: server-side request forgery in proxy cache upstream registry configuration

Medium 5.2 Published 8 Apr 2026 Updated 22 Sep 2026

An organization administrator can exploit proxy cache configuration to force the Quay server to access internal network resources via server-side request forgery.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-32591?

CVE-2026-32591 is a medium-severity server-side request forgery vulnerability in Red Hat Quay 3.10, published on 8 Apr 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-918

Which versions are affected by CVE-2026-32591?

It affects 2 products.

Products include Redhat Mirror Registry for Red Hat Openshift, Redhat Quay.

How do I fix CVE-2026-32591?

No fix has been published for CVE-2026-32591 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-32591 being exploited?

There is no known exploitation of CVE-2026-32591 in the wild and no public exploit code.

Sources

Also known as GHSA-9wjq-f6rc-86wf.