CVE-2026-32591

CVE-2026-32591 is a medium-severity vulnerability in Redhat Mirror Registry For Red Hat Openshift with a CVSS 3.x base score of 5.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-32591?
CVE-2026-32591 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-32591 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32591?
CVE-2026-32591 primarily affects Redhat Mirror Registry For Red Hat Openshift. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-32591?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-32591 have an EU (EUVD) identifier?
Yes. CVE-2026-32591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20517.
When was CVE-2026-32591 published?
CVE-2026-32591 was published on 2026-04-08 and last updated on 2026-06-30.

References

Affected products (3)

More vulnerabilities in Redhat Mirror Registry For Red Hat Openshift

All CVEs affecting Redhat Mirror Registry For Red Hat Openshift →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →