{"answers":{"affected":"2 open source packages ship an affected version, including n8n-mcp. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45707 in the wild and no public exploit code.","fix":"Upgrade n8n-mcp to 2.51.2 or later.","what":"CVE-2026-45707 is a high-severity missing authorization vulnerability in czlonkowski n8n-mcp, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-45707 and fix it if it is affected.\n\nWhat it is: CVE-2026-45707 is a high-severity missing authorization vulnerability in czlonkowski n8n-mcp, published on 29 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-45707 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- n8n-mcp (npm): affected all versions; fixed in 2.51.2\n- n8n-mcp (npm): affected all versions; fixed in 2.51.2\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-2026-45707/ (Markdown: https://insights.sbomify.com/CVE-2026-45707/index.md)","id":"CVE-2026-45707","markdown":"https://insights.sbomify.com/CVE-2026-45707/index.md","name":"CVE-2026-45707","record":{"aliases":["GHSA-jxx9-px88-pj69"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation","data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"n8n MCP server","requires_auth":"low_privilege","summary":"Authenticated tenants can access operator credentials and execute management calls on the operator's n8n instance if tenant headers are missing in multi-tenant mode.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"n8n-mcp","vendor":"n8n-mcp"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI_TENANT=true, the HTTP transport documents that the target n8n instance is selected per-request from x-n8n-url / x-n8n-key headers. Requests that omitted those headers — or supplied only one of them — silently fell back to the process-level N8N_API_URL / N8N_API_KEY credentials configured for the operator's own n8n instance. As a result, an authenticated MCP tenant could cause n8n management calls to execute against the operator's instance instead of its own. This affects HTTP-mode deployments of n8n-mcp that are run as a shared multi-tenant service. Single-tenant deployments (ENABLE_MULTI_TENANT unset or false) are not affected. This vulnerability is fixed in 2.51.2.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete","id":"CVE-2026-45707","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"CubeCart: Authenticated RCE via Invoice Template → Order Print","id":"CVE-2026-45708"},"packages":[{"ecosystem":"npm","fixed":["2.51.2"],"introduced":["0"],"last_affected":[],"package":"n8n-mcp","purl":null,"source":"GHSA-jxx9-px88-pj69"},{"ecosystem":"npm","fixed":["2.51.2"],"introduced":["0"],"last_affected":[],"package":"n8n-mcp","purl":"pkg:npm/n8n-mcp","source":"GHSA-jxx9-px88-pj69"}],"prev":{"headline":"OpenSIPS: OOB Read in Multipart Body Boundary Parsing","id":"CVE-2026-45705"},"products":["n8n-mcp"],"published":"2026-05-29","related":[{"cvss_score":9.9,"headline":"n8n-MCP: Cross-tenant access to workflow version backups in multi-tenant HTTP deployments","id":"CVE-2026-54052","kev_date_added":null,"published":"2026-07-15"},{"cvss_score":8.5,"headline":"n8n-MCP: IPv4-mapped IPv6 addresses bypass SSRF protection in validateUrlSync(), enabling full SSRF for SDK embedders","id":"CVE-2026-42449","kev_date_added":null,"published":"2026-05-07"},{"cvss_score":8.5,"headline":"n8n-MCP has an Authenticated SSRF via instance-URL header in multi-tenant HTTP mode","id":"CVE-2026-39974","kev_date_added":null,"published":"2026-04-09"},{"cvss_score":7.2,"headline":"n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths","id":"CVE-2026-44694","kev_date_added":null,"published":"2026-05-08"},{"cvss_score":6.5,"headline":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","id":"CVE-2026-45582","kev_date_added":null,"published":"2026-05-29"},{"cvss_score":5.3,"headline":"n8n-MCP Logs Sensitive Request Data on Unauthorized /mcp Requests","id":"CVE-2026-41495","kev_date_added":null,"published":"2026-05-08"}],"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":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-01","vendors":["czlonkowski"]},"summary":"Authenticated tenants can access operator credentials and execute management calls on the operator's n8n instance if tenant headers are missing in multi-tenant mode.","url":"https://insights.sbomify.com/CVE-2026-45707/"}