Amazon mcp-gateway-registry <1.35.0 SSRF in registration API
CVE-2026-125926 Published on November 11, 2026
Server-side request forgery in the server registration and update API in mcp-gateway-registry
Server-side request forgery (SSRF) in the server registration and update API in Amazon mcp-gateway-registry before 1.35.0 might allow an authenticated remote user to send requests from the gateway to internal network services and cloud instance metadata endpoints and read the responses via a crafted request.
To remediate this issue, users should upgrade to version 1.35.0.
Vulnerability Analysis
CVE-2026-125926 is exploitable with network access, and requires small amount of 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 high impact on confidentiality, with no impact on integrity, and no impact on availability.
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-2026-125926 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2026-125926
stack.watch emails you whenever new vulnerabilities are published in Aws Mcp Gateway Registry or Amazon Aws. Just hit a watch button to start following.
