{"answers":{"affected":"4 open source packages ship an affected version, including @contentful/mcp-server and @contentful/mcp-tools.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53957 exists.","fix":"Upgrade @contentful/mcp-server to 1.7.19 or later.","what":"CVE-2026-53957 is a high-severity server-side request forgery vulnerability in @contentful contentful-mcp-server, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53957 and fix it if it is affected.\n\nWhat it is: CVE-2026-53957 is a high-severity server-side request forgery vulnerability in @contentful contentful-mcp-server, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53957 exists.\n\nAffected packages and fixed versions:\n- @contentful/mcp-server (npm): affected all versions; fixed in 1.7.19\n- @contentful/mcp-server (npm): affected all versions; fixed in 1.7.19\n- @contentful/mcp-tools (npm): affected all versions; fixed in 0.4.5\n- @contentful/mcp-tools (npm): affected all versions; fixed in 0.4.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-53957/ (Markdown: https://insights.sbomify.com/CVE-2026-53957/index.md)","id":"CVE-2026-53957","markdown":"https://insights.sbomify.com/CVE-2026-53957/index.md","name":"CVE-2026-53957","record":{"aliases":["GHSA-2xhg-73j7-rrgx"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Contentful MCP Server","requires_auth":"low_privilege","summary":"Attackers can redirect API requests to malicious hosts via LLM-controlled arguments, stealing Contentful management tokens and gaining persistent access to spaces.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Contentful MCP Server: export_space/import_space tools pass LLM-controlled `host`/`proxy` args to CMA client, redirecting server PAT to attacker-controlled endpoint","id":"CVE-2026-53957","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":4,"n_references":5,"next":{"headline":"4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment","id":"CVE-2026-53958"},"packages":[{"ecosystem":"npm","fixed":["1.7.19"],"introduced":["0"],"last_affected":[],"package":"@contentful/mcp-server","purl":null,"source":"GHSA-2xhg-73j7-rrgx"},{"ecosystem":"npm","fixed":["1.7.19"],"introduced":["0"],"last_affected":[],"package":"@contentful/mcp-server","purl":"pkg:npm/%40contentful/mcp-server","source":"GHSA-2xhg-73j7-rrgx"},{"ecosystem":"npm","fixed":["0.4.5"],"introduced":["0"],"last_affected":[],"package":"@contentful/mcp-tools","purl":null,"source":"GHSA-2xhg-73j7-rrgx"},{"ecosystem":"npm","fixed":["0.4.5"],"introduced":["0"],"last_affected":[],"package":"@contentful/mcp-tools","purl":"pkg:npm/%40contentful/mcp-tools","source":"GHSA-2xhg-73j7-rrgx"}],"prev":{"headline":"Rattler vulnerable to package cache path traversal via conda package build string","id":"CVE-2026-53956"},"products":["contentful-mcp-server","mcp-server","mcp-tools"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["@contentful","contentful"]},"summary":"Attackers can redirect API requests to malicious hosts via LLM-controlled arguments, stealing Contentful management tokens and gaining persistent access to spaces.","url":"https://insights.sbomify.com/CVE-2026-53957/"}