CVE-2026-16910

Quay: ssrf in red hat quay notification webhooks (slack/generic)

Published Jul 24, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
A flaw was found in Red Hat Quay's notification webhook feature. The Slack and generic webhook notification handlers accept user-supplied URLs without SSRF validation, allowing a repository administrator to make the Quay worker issue POST requests to internal network addresses or cloud infrastructure endpoints that should not be reachable from the application.

Remediation

Vendor Workaround

Restrict network egress from Quay worker pods/containers using network policies or firewall rules to block outbound connections to internal network ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) and cloud metadata endpoints (169.254.169.254). Limit repository creation and admin privileges to trusted users. Configure WEBHOOK_HOSTNAME_BLACKLIST in Quay config to include known internal hostnames and IP ranges.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Redhat quay 3
Vendors & Products Redhat quay 3
Type Values Removed Values Added
References
Metrics threat_severity

None

ssvc

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

threat_severity

Moderate

Type Values Removed Values Added
Description A flaw was found in Red Hat Quay's notification webhook feature. The Slack and generic webhook notification handlers accept user-supplied URLs without SSRF validation, allowing a repository administrator to make the Quay worker issue POST requests to internal network addresses or cloud infrastructure endpoints that should not be reachable from the application.
Title Quay: ssrf in red hat quay notification webhooks (slack/generic)
First Time appeared Redhat
Redhat openshift Update Service
Redhat quay
Weaknesses CWE-918
CPEs cpe:/a:redhat:openshift_update_service:5
cpe:/a:redhat:quay:3
Vendors & Products Redhat
Redhat openshift Update Service
Redhat quay
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 1, 2026, 5:06 AM
Reserved
Jul 24, 2026, 6:26 AM
Status
Awaiting Analysis
Published
Jul 24, 2026, 8:16 AM
Modified
Jul 24, 2026, 8:49 PM
Severity
Moderate
Public date
Jul 7, 2026, 12:00 AM