How severe is CVE-2025-64443?

CVE-2025-64443 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-64443 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64443?

CVE-2025-64443 affects Docker Mcp Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64443?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-64443 have an EU (EUVD) identifier?

Yes. CVE-2025-64443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200985.

When was CVE-2025-64443 published?

CVE-2025-64443 was published on 2025-12-03 and last updated on 2026-06-17.

CVE-2025-64443

CVE-2025-64443 is a critical-severity vulnerability in Docker Mcp Gateway with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-749.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v4: 7.3
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200985
Weakness: CWE-749
Affected product: Docker Mcp Gateway
Published: 2025-12-03
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-64443?: CVE-2025-64443 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-64443 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64443?: CVE-2025-64443 affects Docker Mcp Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64443?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-64443 have an EU (EUVD) identifier?: Yes. CVE-2025-64443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200985.
When was CVE-2025-64443 published?: CVE-2025-64443 was published on 2025-12-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:docker:mcp_gateway:*:*:*:*:*:*:*:*

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