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

> CVE-2025-64443: DNS Rebinding vulnerability present when running MCP Gateway in sse or streaming mode. CVSS 9.6 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-64443
Last updated: 2026-10-18T17:10:00Z

- Published: 2025-12-03 17:41 UTC · Updated: 2026-10-18 17:10 UTC · Assigner: GitHub\_M
- CVSS: 9.6 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- EPSS: 0.43%, 37th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-749

## 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 vendors and products

- docker: mcp-gateway

## Tracked companies

- [Docker](https://rewindex.com/company/docker.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-64443)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-64443)
- [https://github.com/docker/mcp-gateway/commit/6b076b2479d8d1345c50c112119c62978d46858e](https://github.com/docker/mcp-gateway/commit/6b076b2479d8d1345c50c112119c62978d46858e)
- [https://github.com/docker/mcp-gateway/security/advisories/GHSA-46gc-mwh4-cc5r](https://github.com/docker/mcp-gateway/security/advisories/GHSA-46gc-mwh4-cc5r)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-64443 · Markdown: https://rewindex.com/cve/CVE-2025-64443.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-64443 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:14:20.711Z