{"id":"EUVD-2026-78684","revision":"da99b69756ce4e1ea3db5f791a3e99b4","records":[{"revision":"da99b69756ce4e1ea3db5f791a3e99b4","observedAt":"2026-10-28T08:13:57.666+00:00","statement":{"source":"euvd","id":"EUVD-2026-78684","aliases":["CVE-2026-55887","GHSA-r2xf-7jw5-pjg6"],"title":"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 structu…","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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"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","score":8.7,"severity":null}],"references":["https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6","https://github.com/docker/mcp-gateway/pull/498","https://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe","https://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b","https://github.com/docker/mcp-gateway/releases/tag/v0.42.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-78684","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 15, 2026, 3:45:36 PM","dateUpdated":"Sep 15, 2026, 6:02:09 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-78684","identifiers":["EUVD-2026-78684","CVE-2026-55887","GHSA-r2xf-7jw5-pjg6"]},"retained":false,"historicalAffected":[]}],"coverage":[]}