{"id":"EUVD-2026-28825","revision":null,"records":[{"revision":"c76028d4f3c143cf8333a6e97cbbe858","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44694","aliases":[],"title":"n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths","description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.","state":0,"publishedAt":"2026-05-08T19:12:05.326+00:00","modifiedAt":"2026-05-12T02:05:56.224+00:00","affected":[{"ecosystem":"Vendor product","name":"n8n-mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"czlonkowski\",\n                    \"product\": \"n8n-mcp\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.18.7, < 2.50.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L","score":7.2,"severity":"HIGH"}],"references":["https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r","https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44694","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44694","identifiers":["CVE-2026-44694"]},"retained":false,"historicalAffected":[]},{"revision":"6c87cb0dd14640f582365ed4eccfb882","observedAt":"2026-11-07T10:32:00.686+00:00","statement":{"source":"euvd","id":"EUVD-2026-28825","aliases":["CVE-2026-44694","GHSA-cmrh-wvq6-wm9r"],"title":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting t…","description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L","score":7.2,"severity":null}],"references":["https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r","https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28825","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 8, 2026, 7:12:05 PM","dateUpdated":"May 12, 2026, 2:05:56 AM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-28825","identifiers":["EUVD-2026-28825","CVE-2026-44694","GHSA-cmrh-wvq6-wm9r"]},"retained":false,"historicalAffected":[]},{"revision":"7098433fde5e426eb062bae7732c518c","observedAt":"2026-10-27T11:12:17.434+00:00","statement":{"source":"nvd","id":"CVE-2026-44694","aliases":[],"title":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting t…","description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.","state":0,"publishedAt":"2026-05-08T20:16:31.917+00:00","modifiedAt":"2026-10-26T18:10:00.173+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.2,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2","https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44694","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-367","CWE-918"],"productCriteria":["cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-05-08T20:16:31.917","lastModified":"2026-10-26T18:10:00.173"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44694","identifiers":["CVE-2026-44694"]},"retained":false,"historicalAffected":[]},{"revision":"9b8ddf675a4a4dcb81b3a2e82d37a8a9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-cmrh-wvq6-wm9r","aliases":["CVE-2026-44694"],"title":"n8n-mcp webhook and API client paths has an authenticated SSRF","description":"### Summary\n\nAuthenticated Server-Side Request Forgery affecting the webhook trigger tools, the n8n API client (`N8N_API_URL`), and per-request URLs supplied via the `x-n8n-url` header in multi-tenant HTTP mode.\n\n### Impact\n\nA caller with access to the MCP session can drive HTTP requests from the n8n-mcp host to internal services and cloud metadata endpoints that the SSRF gate is meant to block. The response body is returned to the caller, making internal-service enumeration and credential theft immediate without any out-of-band channel.\n\n- **Multi-tenant HTTP deployments** where tenants share an `AUTH_TOKEN`: any tenant with valid credentials can reach the operator's cloud metadata service and exfiltrate temporary IAM / GCP service account / Azure managed-identity credentials.\n- **Single-tenant deployments**: indirect prompt injection through tool arguments reaches the same surface; an attacker who can influence the LLM's tool calls can read internal services from the n8n-mcp host.\n- **Stdio deployments** are reachable via the same prompt-injection path.\n\n### Patched Versions\n\nFixed in `n8n-mcp@2.50.2`.\n\n**Note for operators:** The same SSRF gate that previously covered webhook URLs now also covers the n8n API client base URL. If `N8N_API_URL` points at `http://localhost:5678` (n8n on the same host) or an RFC1918 address (n8n on the same private network), set `WEBHOOK_SECURITY_MODE=moderate` (allows localhost, still blocks RFC1918 and cloud metadata) or `WEBHOOK_SECURITY_MODE=permissive` (allows RFC1918 too — only safe on a trusted private network). Default `strict` is correct for deployments where n8n is reachable at a public hostname.\n\n### Workarounds\n\nFor deployments that cannot upgrade immediately:\n\n1. **Restrict network egress** from the n8n-mcp host with a firewall, reverse proxy, or cloud security group. Explicitly deny cloud metadata IPs (`169.254.169.254`, `169.254.170.2`, `100.100.100.200`, `192.0.0.192`, and the GCP `metadata.google.internal` resolved IP) and any RFC1918 networks the server does not legitimately need to reach.\n2. **Run in stdio mode** instead of HTTP if the multi-tenant surface is not needed (no shared `AUTH_TOKEN` to compromise).\n3. **Disable workflow management tools** via `DISABLED_TOOLS=n8n_trigger_webhook_workflow,n8n_create_workflow,n8n_test_workflow` if the deployment does not need them.\n\n### Credit\n\nReported by [@fg0x0](https://github.com/fg0x0).","state":0,"publishedAt":"2026-05-08T16:59:17+00:00","modifiedAt":"2026-05-13T13:55:36.573227+00:00","affected":[{"ecosystem":"npm","name":"n8n-mcp","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.18.7"},{"kind":"fixed","version":"2.50.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r","https://nvd.nist.gov/vuln/detail/CVE-2026-44694","https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb","https://github.com/czlonkowski/n8n-mcp","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2"],"sourceUrl":"https://github.com/advisories/GHSA-cmrh-wvq6-wm9r","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-cmrh-wvq6-wm9r","identifiers":["GHSA-cmrh-wvq6-wm9r","CVE-2026-44694"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T17:07:37.1829709+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T17:07:37.1829709+00:00","lastSuccessAt":"2026-11-07T17:07:37.3549159+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:37.3549172+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-715e663378e343ca50c7397586f2d227eca3ece57a7a73d5f48eaadc71eb9f69","complete":true,"records":420933,"lastAttemptAt":"2026-11-07T17:07:36.095653+00:00","lastSuccessAt":"2026-11-07T17:07:36.0305426+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:36.095653+00:00","snapshotPublishedAt":"2026-11-07T16:30:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ce98ec71edc04bf7b5b5ed5b4106954c","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T17:19:56.3581416+00:00","lastSuccessAt":"2026-11-07T17:19:56.354+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:19:56.354+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T17:07:37.1829709+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T17:07:37.1829709+00:00","lastSuccessAt":"2026-11-07T17:07:37.3564231+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:37.3564236+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-57173bad19094db6a6a9d0334caa764d","complete":true,"records":13645,"lastAttemptAt":"2026-11-07T17:08:02.7189692+00:00","lastSuccessAt":"2026-11-07T17:08:02.715+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:08:02.715+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-07T17:07:36.7559298+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:36.7559298+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-07T17:07:36.1583672+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:36.1583672+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-07T17:07:37.135444+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:37.135444+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-40ad6183a951565ace1520a9b4d631e1d0bfb1d4bf7c5574c375032559f3ff53","complete":true,"records":231292,"lastAttemptAt":"2026-11-07T17:07:36.637447+00:00","lastSuccessAt":"2026-11-07T10:29:00.4821259+00:00","error":null,"lastVerifiedAt":"2026-11-07T17:07:36.637447+00:00","snapshotPublishedAt":"2026-11-07T09:32:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}