Red Hat Quay SSRF via Unvalidated URLs in Webhook Notification
CVE-2026-16910 Published on July 24, 2026
Quay: ssrf in red hat quay notification webhooks (slack/generic)
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.
Vulnerability Analysis
CVE-2026-16910 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Timeline
Reported to Red Hat.
Made public.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-16910 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-16910
stack.watch emails you whenever new vulnerabilities are published in Red Hat Openshift Update Service or Red Hat Quay. Just hit a watch button to start following.
