{"id":"EUVD-2026-78684","enisaUuid":"f9ab5b53-09f1-336c-8ba1-9bbbec6c6908","description":"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.","datePublished":"Sep 15, 2026, 3:45:36 PM","dateUpdated":"Sep 15, 2026, 6:02:09 PM","baseScore":8.7,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6\nhttps://github.com/docker/mcp-gateway/pull/498\nhttps://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe\nhttps://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b\nhttps://github.com/docker/mcp-gateway/releases/tag/v0.42.2\n","aliases":"CVE-2026-55887\nGHSA-r2xf-7jw5-pjg6\n","assigner":"GitHub_M","epss":0.22,"enisaIdProduct":[{"id":"4eb20eb3-7524-3bec-a178-6e5b3cf248aa","product":{"name":"mcp-gateway","vendor":{"name":"Docker"}},"product_version":"0.21.0, \u003c 0.42.2"}],"enisaIdVendor":[{"id":"51aa7c79-bf13-3849-b0c7-cb3cda488ec1","vendor":{"name":"Docker"}}],"enisaIdVulnerability":[{"id":"45901a23-5506-3961-87ef-1fb9c2f526de","vulnerability":{"id":"GHSA-r2xf-7jw5-pjg6","description":"Docker MCP Gateway: Argument injection via OCI image label YAML","datePublished":"Jun 18, 2026, 1:05:06 PM","dateUpdated":"Jun 18, 2026, 1:05:06 PM","baseScore":0.0,"references":"https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6\nhttps://github.com/docker/mcp-gateway\n","enisa_id":"EUVD-2026-78684\n","aliases":"GHSA-r2xf-7jw5-pjg6\nCVE-2026-55887\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:57:08 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"4d1b775f-ca96-3c89-b63c-82dc3b7958d6","vulnerability":{"id":"CVE-2026-55887","description":"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.","datePublished":"Sep 15, 2026, 3:45:36 PM","dateUpdated":"Sep 15, 2026, 6:02:09 PM","status":"PUBLISHED","baseScore":8.7,"baseScoreVersion":"4.0","baseScoreVector":"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","references":"https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6\nhttps://github.com/docker/mcp-gateway/pull/498\nhttps://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe\nhttps://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b\nhttps://github.com/docker/mcp-gateway/releases/tag/v0.42.2\n","enisa_id":"EUVD-2026-78684\n","assigner":"GitHub_M","epss":0.22,"dataProcessed":"Oct 28, 2026, 7:16:45 AM","vulnerabilityProduct":[{"id":"1b5bc8c6-e8e2-3d69-b9b9-5c412f8aea36","product":{"name":"mcp-gateway","vendor":{"name":"Docker"}},"product_version":"0.21.0, \u003c 0.42.2"}],"vulnerabilityVendor":[{"id":"92d07893-ae42-3f92-a374-46a29c10611b","vendor":{"name":"Docker"}}]}}],"enisaIdAdvisory":[]}