{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53957","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-11T15:50:01.282Z","datePublished":"2026-09-15T14:34:53.699Z","dateUpdated":"2026-09-17T14:32:11.722Z"},"containers":{"cna":{"title":"Contentful MCP Server: export_space/import_space tools pass LLM-controlled `host`/`proxy` args to CMA client, redirecting server PAT to attacker-controlled endpoint","problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/contentful/contentful-mcp-server/security/advisories/GHSA-2xhg-73j7-rrgx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/contentful/contentful-mcp-server/security/advisories/GHSA-2xhg-73j7-rrgx"},{"name":"https://github.com/contentful/contentful-mcp-server/pull/376","tags":["x_refsource_MISC"],"url":"https://github.com/contentful/contentful-mcp-server/pull/376"},{"name":"https://github.com/contentful/contentful-mcp-server/commit/fa7477ee48515f4248bc91a025eab0ca83423fe0","tags":["x_refsource_MISC"],"url":"https://github.com/contentful/contentful-mcp-server/commit/fa7477ee48515f4248bc91a025eab0ca83423fe0"},{"name":"https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-server@1.7.19","tags":["x_refsource_MISC"],"url":"https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-server@1.7.19"},{"name":"https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-tools@0.4.5","tags":["x_refsource_MISC"],"url":"https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-tools@0.4.5"}],"affected":[{"vendor":"contentful","product":"contentful-mcp-server","versions":[{"version":"< 1.7.19","status":"affected"}]},{"vendor":"@contentful","product":"mcp-server","versions":[{"version":"< 1.7.19","status":"affected"}]},{"vendor":"@contentful","product":"mcp-tools","versions":[{"version":"< 0.4.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-15T14:34:53.699Z"},"descriptions":[{"lang":"en","value":"Contentful MCP Server is a Model Context Protocol server for the Contentful Management API. Prior to @contentful/mcp-server 1.7.19 and @contentful/mcp-tools 0.4.5, export_space and import_space in packages/mcp-tools/src/tools/jobs/space-to-space-migration/exportSpace.ts and packages/mcp-tools/src/tools/jobs/space-to-space-migration/importSpace.ts expose host, proxy, rawProxy, and insecure network options to LLM-controlled tool arguments and combine those options with the server's CONTENTFUL_MANAGEMENT_TOKEN. After space_to_space_migration_handler enables the migration tools, a direct MCP call or prompt injection through attacker-controlled Contentful content can redirect Contentful Management API requests and their Authorization header to an attacker-controlled host or proxy. The regular tools that use createToolClient are unaffected because those tools pin the host from server configuration. Exposure of the personal access token permits persistent out-of-band access to every Contentful space within the token's scope. This issue is fixed in @contentful/mcp-server 1.7.19 and @contentful/mcp-tools 0.4.5."}],"source":{"advisory":"GHSA-2xhg-73j7-rrgx","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/contentful/contentful-mcp-server/security/advisories/GHSA-2xhg-73j7-rrgx","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T14:31:40.554851Z","id":"CVE-2026-53957","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-17T14:32:11.722Z"}}]}}