CVE-2025-64443: Docker MCP Plugin and Docker MCP Gateway have DNS Rebinding vulnerability when running in sse or streaming mode

CVE-2025-64443 · Severity: critical · CVSS 9.6 · Published 2025-12-03

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.

Vendors: Docker, Go.

Quick answers

Is CVE-2025-64443 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-64443 being exploited in the wild.
How severe is CVE-2025-64443?
Critical severity, with a CVSS score of 9.6, published 3 December 2025.
Which products and versions are affected?
github.com/docker/mcp-gateway (Go) SEMVER:introduced=0,fixed=0.28.0.
Is there a fix for CVE-2025-64443?
Yes. github.com/docker/mcp-gateway (Go): upgrade to 0.28.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-64443?
Check whether you run Docker Mcp Gateway or github.com/docker/mcp-gateway (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/docker/mcp-gateway (Go): upgrade to 0.28.0 or later
    go get github.com/docker/mcp-gateway@v0.28.0

Affected products

  • Docker Mcp Gateway
  • github.com/docker/mcp-gateway (Go) SEMVER:introduced=0,fixed=0.28.0

Identifiers

  • CVE-2025-64443
  • GHSA-46gc-mwh4-cc5r
  • GO-2025-4179

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