{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15927", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-07-16T06:31:41.405Z", "datePublished": "2026-07-21T04:45:27.751Z", "dateUpdated": "2026-07-21T04:45:27.751Z"}, "containers": {"cna": {"title": "Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in Red Hat Quay's repository-level mirror configuration\nfeature. The POST and PUT handlers in endpoints/api/mirror.py accept an\nexternal_reference parameter without SSRF validation, unlike the\norganization-level mirror handlers which apply validate_external_registry_url().\nA repository administrator can supply a crafted hostname that causes the Quay\nmirror worker to make requests via Skopeo to internal network services, cloud\nmetadata endpoints, or other resources not intended to be reachable from the\nQuay application."}], "affected": [{"vendor": "Red Hat", "product": "mirror registry for Red Hat OpenShift 2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "openshift/mirror-registry-rhel8", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:mirror_registry:2"]}, {"vendor": "Red Hat", "product": "Red Hat Quay 3", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "quay/quay-rhel8", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:quay:3"]}, {"vendor": "Red Hat", "product": "Red Hat Quay 3", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "quay/quay-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:quay:3"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-15927", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501256", "name": "RHBZ#2501256", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-07-16T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "description": "Server-Side Request Forgery (SSRF)", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-918: Server-Side Request Forgery (SSRF)", "workarounds": [{"lang": "en", "value": "Restrict network egress from Quay mirror worker pods/containers using network\npolicies or firewall rules to block access to internal network ranges\n(10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) and cloud metadata endpoints\n(169.254.169.254, metadata.google.internal). Limit repository creation and\nadmin privileges to trusted users via Quay's RBAC configuration. If\nrepository-level mirroring is not required, disable the feature or restrict\naccess to the mirror API endpoints through a reverse proxy."}], "timeline": [{"lang": "en", "time": "2026-02-13T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-07-16T00:00:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "This issue was discovered by Martin Brodeur and Shaon Hossain (Red Hat)."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-07-21T04:45:27.751Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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