CVE-2025-64443: mcp gateway — Fix

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.

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CVSS v3.1 Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-749 CWE-749

Affected Products

Vendor	Product	Versions
docker	mcp_gateway	< 0.28.0

References

Advisories & Patches

https://github.com/docker/mcp-gateway/commit/6b076b2479d8d1345c50c112119c62978d46858e https://github.com/docker/mcp-gateway/security/advisories/GHSA-46gc-mwh4-cc5r

Frequently Asked Questions

What is CVE-2025-64443? +

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. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2025-64443? +

CVE-2025-64443 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-64443? +

CVE-2025-64443 affects products from docker, specifically: mcp_gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64443? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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