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VulnerabilityPublished

CVE-2025-64443: docker mcp-gateway · Exposed Dangerous Method or Function

Affects docker mcp-gatewaySource CVE Database V5

0

Not known to be exploited · CVSS 7.3 High : upgrade to 0.28.0 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score
7.3High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.28.0
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade docker/mcp-gateway to 0.28.0.

Affected software

ProductAffectedFixed in
GitHubdocker/mcp-gatewaypkg:github/docker/mcp-gatewayOther threatsAffected
  • <0.28.0
Fixed in
  • 0.28.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The primary and most effective mitigation is to upgrade MCP Gateway to version 0.28.0 or later, where the DNS rebinding vulnerability is fixed. Organizations should audit their MCP Gateway deployments to identify instances running in sse or streaming transport modes and prioritize patching these. If immediate upgrade is not feasible, temporarily switching MCP Gateway to the default stdio mode can mitigate exposure, as it does not listen on network ports and is not vulnerable to this attack. Network-level mitigations include implementing strict Content Security Policies (CSP) and SameSite cookie attributes to reduce the risk of DNS rebinding attacks via browsers. Additionally, organizations should employ network segmentation and firewall rules to restrict access to MCP Gateway ports only to trusted internal networks. User awareness training to recognize phishing and malicious advertisements can reduce the likelihood of user interaction required for exploitation. Monitoring network traffic for unusual connections to MCP Gateway ports and deploying web application firewalls (WAF) with rules targeting DNS rebinding patterns can provide additional defense layers. Regular vulnerability scanning and penetration testing focused on container orchestration components should include checks for this vulnerability.

Description

CVE-2025-64443 is a high-severity vulnerability in docker's MCP Gateway versions prior to 0.28.0, caused by DNS rebinding when running in sse or streaming transport modes. This flaw allows attackers to exploit browser-based access to MCP servers behind the gateway by tricking victims into visiting malicious websites or ads, enabling manipulation of exposed tools and features. The default stdio mode is not affected as it does not listen on network ports. No known exploits are currently in the wild, and the vulnerability was fixed in version 0.28.0. The vulnerability has a CVSS 4.0 score of 7.

References

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