CVE-2026-44694 (GCVE-0-2026-44694)

Vulnerability from cvelistv5 – Published: 2026-05-08 19:12 – Updated: 2026-05-08 19:12
VLAI?
Title
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
Summary
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.
Severity ?
7.2 (High)
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
CWE
  • CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
czlonkowski n8n-mcp Affected: >= 2.18.7, < 2.50.2
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          "vendor": "czlonkowski",
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        }
      ],
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            "baseScore": 7.2,
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            "subAvailabilityImpact": "LOW",
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              "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
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              "type": "CWE"
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          ]
        },
        {
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-08T19:12:05.326Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "url": "https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r"
        },
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          "name": "https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb"
        },
        {
          "name": "https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2",
          "tags": [
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          "url": "https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2"
        }
      ],
      "source": {
        "advisory": "GHSA-cmrh-wvq6-wm9r",
        "discovery": "UNKNOWN"
      },
      "title": "n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44694",
    "datePublished": "2026-05-08T19:12:05.326Z",
    "dateReserved": "2026-05-07T17:07:09.316Z",
    "dateUpdated": "2026-05-08T19:12:05.326Z",
    "state": "PUBLISHED"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.