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.
Published: 2026-07-24
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

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

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History

Fri, 24 Jul 2026 18:30:00 +0000

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


Fri, 24 Jul 2026 07:30:00 +0000

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'}


Subscriptions

Redhat Openshift Update Service Quay
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-07-24T10:55:46.478Z

Reserved: 2026-07-24T06:26:22.299Z

Link: CVE-2026-16910

cve-icon Vulnrichment

Updated: 2026-07-24T10:55:39.005Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-07T00:00:00Z

Links: CVE-2026-16910 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)