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.
History

Tue, 21 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 21 Jul 2026 05:45:00 +0000

Type Values Removed Values Added
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.
Title Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation
First Time appeared Redhat
Redhat mirror Registry
Redhat quay
Weaknesses CWE-918
CPEs cpe:/a:redhat:mirror_registry:2
cpe:/a:redhat:quay:3
Vendors & Products Redhat
Redhat mirror Registry
Redhat quay
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-07-21T14:55:42.159Z

Reserved: 2026-07-16T06:31:41.405Z

Link: CVE-2026-15927

cve-icon Vulnrichment

Updated: 2026-07-21T13:12:16.167Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-16T00:00:00Z

Links: CVE-2026-15927 - Bugzilla

cve-icon OpenCVE Enrichment

No data.