Vulnerability · Published Dec 3, 2025 · Assigned by GitHub_M
CVE-2025-64443DNS Rebinding vulnerability present when running MCP Gateway in sse or streaming mode
High 7.3
In plain English
A high-severity security flaw in mcp-gateway from docker. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
MCP Gateway allows easy and secure running and deployment of MCP servers. In versions 0.27.0 and earlier, when MCP Gateway runs in sse or streaming transport mode, it is vulnerable to DNS rebinding. An attacker who can get a victim to visit a malicious website or be served a malicious advertisement can perform browser-based exploitation of MCP servers executing behind the gateway, including manipulating tools or other features exposed by those MCP servers. MCP Gateway is not affected when running in the default stdio mode, which does not listen on network ports. Version 0.28.0 fixes this issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/docker/mcp-gateway | 0.28.0 | GHSA-46gc-mwh4-cc5r |
| Go | github.com/docker/mcp-gateway | 0.28.0 | GO-2025-4179 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| docker | mcp-gateway | < 0.28.0 |
Weakness: CWE-749 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:H/VA:N/SC:H/SI:H/SA:H