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Vulnerability · Published Jul 21, 2026 · Assigned by redhat

CVE-2026-15927Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation

Medium 6.8

In plain English

A medium-severity server-side request forgery in mirror registry for Red Hat OpenShift 2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.6%top 50.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Quay 3.10 see references
Red Hat Red Hat Quay 3.12 see references
Red Hat Red Hat Quay 3.14 see references
Red Hat Red Hat Quay 3.15 see references
Red Hat Red Hat Quay 3.16 see references
Red Hat Red Hat Quay 3.17 see references
Red Hat Red Hat Quay 3.9 see references
Red Hat mirror registry for Red Hat OpenShift 2 see references

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

References