CVE-2026-15927
Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation
CVSS Score
6.8
EPSS Score
0.2%
EPSS Percentile
14th
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.
| CWE | CWE-918 |
| Vendor | red hat |
| Product | red hat quay 3.9 |
| Published | Jul 21, 2026 |
| Last Updated | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Quay 3.9
All versions affected Red Hat / mirror registry for Red Hat OpenShift 2
All versions affected Red Hat / Red Hat Quay 3
All versions affected References
Credits
This issue was discovered by Martin Brodeur and Shaon Hossain (Red Hat).