{"cve":"CVE-2026-53957","nvd":{"published":"2026-09-15T15:17:17.367","modified":"2026-09-30T17:51:56.193","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7},"cwes":["CWE-918"],"references":["https://github.com/contentful/contentful-mcp-server/commit/fa7477ee48515f4248bc91a025eab0ca83423fe0","https://github.com/contentful/contentful-mcp-server/pull/376","https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-server@1.7.19","https://github.com/contentful/contentful-mcp-server/releases/tag/mcp-tools@0.4.5","https://github.com/contentful/contentful-mcp-server/security/advisories/GHSA-2xhg-73j7-rrgx"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-53957","score":0.00415,"percentile":0.35541,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-2xhg-73j7-rrgx","url":"https://osv.dev/vulnerability/GHSA-2xhg-73j7-rrgx","summary":"Contentful MCP Server: export_space/import_space tools pass LLM-controlled `host`/`proxy` args to CMA client, redirecting server PAT to attacker-controlled endpoint","modified":"2026-08-19T19:33:55.151737Z","packages":[{"ecosystem":"npm","name":"@contentful/mcp-server","purl":"pkg:npm/%40contentful/mcp-server","ranges":["<1.7.19"],"fixed":["1.7.19"]},{"ecosystem":"npm","name":"@contentful/mcp-tools","purl":"pkg:npm/%40contentful/mcp-tools","ranges":["<0.4.5"],"fixed":["0.4.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}