CVE-2026-15927
Medium
Description
A flaw was found in Red Hat Quay's repository-level mirror configuration feature. The POST and PUT handlers in endpoints/api/mirror.py accept an external_reference parameter without SSRF validation, unlike the organization-level mirror handlers which apply validate_external_registry_url(). A repository administrator can supply a crafted hostname that causes the Quay mirror worker to make requests via Skopeo to internal network services, cloud metadata endpoints, or other resources not intended to be reachable from the Quay application.
SeverityMedium
CVSS6.8
Exploit probability—
Product
mirror registry for Red Hat OpenShift 2
PublishedJul 21, 2026
First seenJul 21, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat mirror registry for Red Hat OpenShift 2 | No range specified | — |
| quay 3.10 | No range specified | — |
| quay 3.12 | No range specified | — |
| quay 3.14 | No range specified | — |
| quay 3.15 | No range specified | — |
| quay 3.16 | No range specified | — |
| quay 3.17 | No range specified | — |
| quay 3.9 | No range specified | — |
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