CVE-2026-85471

Quay: quay: webhook notification ssrf -- hostname-string blocklist trivially bypassable

Published Oct 12, 2026 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
A flaw was found in Quay. An authenticated repository administrator could bypass the hostname blacklist in webhook notifications, leading to a Server-Side Request Forgery (SSRF) vulnerability. This allows the Quay application to be tricked into sending requests to internal network resources, such as cloud metadata services or other services within the cluster. Consequently, this could lead to the disclosure of sensitive information from these internal services.

Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Red Hat
Red Hat red Hat Quay 3
Redhat mirror Registry For Red Hat Openshift
Vendors & Products Red Hat
Red Hat red Hat Quay 3
Redhat mirror Registry For Red Hat Openshift
Type Values Removed Values Added
Description A flaw was found in Quay. An authenticated repository administrator could bypass the hostname blacklist in webhook notifications, leading to a Server-Side Request Forgery (SSRF) vulnerability. This allows the Quay application to be tricked into sending requests to internal network resources, such as cloud metadata services or other services within the cluster. Consequently, this could lead to the disclosure of sensitive information from these internal services.
Title Quay: quay: webhook notification ssrf -- hostname-string blocklist trivially bypassable
First Time appeared Redhat
Redhat mirror Registry
Redhat quay
Weaknesses CWE-918
CPEs cpe:/a:redhat:mirror_registry:1
cpe:/a:redhat:mirror_registry:2
cpe:/a:redhat:quay:3
Vendors & Products Redhat
Redhat mirror Registry
Redhat quay
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 1, 2026, 5:03 AM
Reserved
Sep 3, 2026, 8:10 PM
Status
Awaiting Analysis
Published
Oct 12, 2026, 7:16 PM
Modified
Oct 15, 2026, 4:33 PM
Severity
Moderate
Public date
Oct 12, 2026, 6:23 PM