6.8 Medium

A flaw was found in Red Hat Quay's repository-level mirror configuration feature.

CVE-2026-15927

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 externalreference parameter without SSRF validation, unlike the organization-level mirror handlers which apply validateexternalregistryurl(). 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.

Assessment

CVSS: 6.8 (v3.1)
Severity: Medium
EPSS: 0.6% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 21 July 2026
Last updated: 1 November 2026
Affected: Red Hat
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

At the source

EUVD (ENISA)

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