CVE-2026-105740 (GCVE-0-2026-105740)

Vulnerability from cvelistv5 – Published: 2026-10-05 20:46 – Updated: 2026-10-06 18:20
VLAI Previdian
Title
Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exec {command}" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 18:20 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7613 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
langflow-ai langflow Affected: < 1.9.0
guessed Create a notification for this product.
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a8d43d47-e76e-447b-9670-e0782948e8a8

Vulnerability ID: CVE-2026-105740

Status: Confirmed

Status Updated: 2026-10-11 17:42 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-11
Asserted: 2026-10-11
Scope
Notes: Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server | Affected: Langflow-ai / langflow | CVSS: 9.9 (CRITICAL) | EPSS: 0.00589 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server
Cve Id CVE-2026-105740
Vendor Langflow-ai
Ghsa Id None
Product langflow
Added Date 2026-10-11T17:42:21.104Z
Cvss Score 9.9
Epss Score 0.00589
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.46619
Used In Malware unknown
Vulnerability Id CVE-2026-105740
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-12 18:00 UTC | Updated: 2026-10-12 18:00 UTC
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-105740",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-06T18:20:20.481095Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-06T18:20:28.495Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
          },
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "langflow",
          "vendor": "langflow-ai",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.9.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the \"Stdio\" transport. The user-supplied command field is passed directly to bash -c \"exec {command}\" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-05T20:46:18.854Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
        },
        {
          "name": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
        },
        {
          "name": "https://github.com/langflow-ai/langflow/pull/12290",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langflow-ai/langflow/pull/12290"
        },
        {
          "name": "https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0"
        }
      ],
      "source": {
        "advisory": "GHSA-7w94-79vh-5mr2",
        "discovery": "UNKNOWN"
      },
      "title": "Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-105740",
    "datePublished": "2026-10-05T20:46:18.854Z",
    "dateReserved": "2026-10-05T19:11:07.946Z",
    "dateUpdated": "2026-10-06T18:20:28.495Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-105740",
      "date": "2026-10-19",
      "epss": "0.00589",
      "percentile": "0.4714"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "langflow",
                "vendor": "langflow-ai",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 1.9.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the \"Stdio\" transport. The user-supplied command field is passed directly to bash -c \"exec {command}\" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0."
          }
        ],
        "id": "CVE-2026-105740",
        "lastModified": "2026-10-06T19:17:41.197",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.9,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.1,
              "impactScore": 6.0,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-105740",
                "options": [
                  {
                    "exploitation": "poc"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-06T18:20:20.481095Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-10-05T21:16:35.567",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/langflow-ai/langflow/pull/12290"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Undergoing Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-78"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-105740",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-06T18:20:20.481095Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-06T18:20:04.560Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
              },
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "langflow",
              "vendor": "langflow-ai",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 1.9.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the \"Stdio\" transport. The user-supplied command field is passed directly to bash -c \"exec {command}\" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.9,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-78",
                  "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-05T20:46:18.854Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-7w94-79vh-5mr2"
            },
            {
              "name": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/langflow-ai/langflow/security/advisories/GHSA-w794-rj3p-xv45"
            },
            {
              "name": "https://github.com/langflow-ai/langflow/pull/12290",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/langflow-ai/langflow/pull/12290"
            },
            {
              "name": "https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/langflow-ai/langflow/commit/efbc4a16e639409d938a4883463d27ef0bc637a0"
            }
          ],
          "source": {
            "advisory": "GHSA-7w94-79vh-5mr2",
            "discovery": "UNKNOWN"
          },
          "title": "Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-105740",
        "datePublished": "2026-10-05T20:46:18.854Z",
        "dateReserved": "2026-10-05T19:11:07.946Z",
        "dateUpdated": "2026-10-06T18:20:28.495Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.