CVE-2025-64443 HIGH

CVE-2025-64443: DNS Rebinding vulnerability present when running MCP Gateway in sse or streaming mode

Vendor Docker

Product mcp-gateway

Weakness CWE-749

Published December 3, 2025

Last update December 3, 2025

View on NVD All CVEs

CVSS base score

7.3/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction —

Confidentiality —

Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 3, 2025 CVE published

December 3, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-64443 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/749.html