CVE-2026-55887
- Source
- https://cve.org/CVERecord?id=CVE-2026-55887
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-55887.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-55887
- Aliases
- Downstream
- Related
- Published
- 2026-09-15T15:45:36Z
- Modified
- 2026-10-16T03:00:05Z
- Severity
-
- 8.7 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- MCP Gateway: Argument injection via OCI image label YAML in Docker MCP Gateway
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-88" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55887.json" }- References
-
- https://github.com/docker/mcp-gateway/releases/tag/v0.42.2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55887.json
- https://github.com/docker/mcp-gateway/security/advisories/GHSA-r2xf-7jw5-pjg6
- https://nvd.nist.gov/vuln/detail/CVE-2026-55887
- https://github.com/docker/mcp-gateway/commit/306d2d94a3b526f43281313321bf784f2d46a7fe
- https://github.com/docker/mcp-gateway/commit/439b2200d9e26a4ff414aeb043785df45a78422b
- https://github.com/docker/mcp-gateway/pull/498
Affected packages
Git / github.com/docker/mcp-gateway
Affected ranges
- Type
- GIT
- Repo
- https://github.com/docker/mcp-gateway
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0.21.0" }, { "fixed": "0.42.2" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "306d2d94a3b526f43281313321bf784f2d46a7fe" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "439b2200d9e26a4ff414aeb043785df45a78422b" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v0.42.2", "range": [ { "fixed": "439b2200d9e26a4ff414aeb043785df45a78422b" } ], "source": "REFERENCES_TAG" } ] }