CVE-2026-125926 Server-side request forgery in the server registration and update API in mcp-gateway-registry
Authenticated users can make the gateway send requests to internal services and cloud metadata endpoints and read responses.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-125926?
CVE-2026-125926 is a medium-severity server-side request forgery vulnerability in AWS mcp-gateway-registry, published on 11 Nov 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-125926?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-125926?
No fix has been published for CVE-2026-125926 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-125926 being exploited?
There is no known exploitation of CVE-2026-125926 in the wild and no public exploit code.