Flowise through 3.1.4 Custom Function Sandbox Escape RCE via LocalFileStore

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-119978",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-10-30T17:28:31.216Z",
    "dateReserved": "2026-10-30T17:24:18.282Z",
    "datePublished": "2026-10-30T17:28:31.216Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-10-30T17:28:31.216Z"
      },
      "datePublic": "2026-10-30T00:00:00.000Z",
      "title": "Flowise through 3.1.4 Custom Function Sandbox Escape RCE via LocalFileStore",
      "descriptions": [
        {
          "lang": "en",
          "value": "Flowise through 3.1.4 contains a sandbox escape vulnerability that allows authenticated users to execute OS commands by abusing allowlisted langchain and mammoth modules when ALLOW_BUILTIN_DEP=true. Attackers can submit JavaScript to /api/v1/node-custom-function that writes a file into the mammoth package via LocalFileStore and requires it, escaping vm2 as the Flowise process user."
        }
      ],
      "affected": [
        {
          "vendor": "FlowiseAI",
          "product": "Flowise",
          "repo": "https://github.com/FlowiseAI/Flowise",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "3.1.4"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Exposed Dangerous Method or Function",
              "cweId": "CWE-749",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L55-L114",
          "tags": [
            "technical-description"
          ]
        },
        {
          "url": "https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L1733",
          "tags": [
            "technical-description"
          ]
        },
        {
          "url": "https://github.com/advisories/GHSA-9gvv-qjj3-2p6g",
          "name": "GitHub Security Advisory (GHSA-9gvv-qjj3-2p6g)",
          "tags": [
            "related"
          ]
        },
        {
          "url": "https://github.com/FlowiseAI/Flowise",
          "tags": [
            "product"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/flowise-through-3.1.4-custom-function-sandbox-escape-rce-via-localfilestore",
          "name": "VulnCheck Advisory: Flowise through 3.1.4 Custom Function Sandbox Escape RCE via LocalFileStore",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "HIGH",
            "baseScore": 8.5,
            "baseSeverity": "HIGH"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "soovwv",
          "type": "finder"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
      ]
    }
  }
}