{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-55887",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-17T16:59:42.760Z",
        "datePublished": "2026-09-15T15:45:36.420Z",
        "dateUpdated": "2026-09-15T18:02:09.186Z"
    },
    "containers": {
        "cna": {
            "title": "MCP Gateway: Argument injection via OCI image label YAML in Docker MCP Gateway",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-88",
                            "lang": "en",
                            "description": "CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "NONE",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "subAvailabilityImpact": "HIGH",
                        "baseScore": 8.7,
                        "baseSeverity": "HIGH",
                        "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6"
                },
                {
                    "name": "https://github.com/docker/mcp-gateway/pull/498",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/docker/mcp-gateway/pull/498"
                },
                {
                    "name": "https://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe"
                },
                {
                    "name": "https://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b"
                },
                {
                    "name": "https://github.com/docker/mcp-gateway/releases/tag/v0.42.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/docker/mcp-gateway/releases/tag/v0.42.2"
                }
            ],
            "affected": [
                {
                    "vendor": "docker",
                    "product": "mcp-gateway",
                    "versions": [
                        {
                            "version": ">= 0.21.0, < 0.42.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-15T15:45:36.420Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "MCP Gateway allows easy and secure running and deployment of MCP servers. From 0.21.0 until 0.42.2, Docker MCP Gateway YAML-unmarshalled the attacker-controlled io.docker.server.metadata OCI image label into the broad catalog.Server structure for direct docker:// references and catalog snapshot imports in pkg/oci/self_contained.go and pkg/workingset/workingset.go. Runtime-shaping fields including Volumes, User, and ExtraHosts were then appended to the docker run argument vector without an origin allowlist, allowing a malicious image author to request host filesystem or Docker socket mounts and UID 0 execution when a victim selected or pulled the image. This container-creation-time boundary bypass can execute arbitrary code on the host and is not prevented by no-new-privileges because no in-container privilege escalation is required. This issue is fixed in version 0.42.2."
                }
            ],
            "source": {
                "advisory": "GHSA-r2xf-7jw5-pjg6",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-15T17:45:43.530044Z",
                                "id": "CVE-2026-55887",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-15T18:02:09.186Z"
                }
            }
        ]
    }
}