CVE-2026-73601

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73601", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-13T11:15:12.095Z", "datePublished": "2026-08-13T11:28:08.066Z", "dateUpdated": "2026-08-14T20:18:44.625Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-13T11:28:08.066Z"}, "datePublic": "2026-07-29T00:00:00.000Z", "title": "Flowise before 3.1.3 Remote Code Execution via Custom MCP", "descriptions": [{"lang": "en", "value": "Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')", "cweId": "CWE-95", "type": "CWE"}]}], "affected": [{"vendor": "FlowiseAI", "product": "Flowise", "defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "3.1.3"}, {"version": "3.1.3", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "FlowiseAI", "product": "Flowise", "defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise-components", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "3.1.3"}, {"version": "3.1.3", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.1.3"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 9, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-g98q-rm45-q9h8", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-g98q-rm45-q9h8)"}, {"name": "VulnCheck Advisory: Flowise before 3.1.3 Remote Code Execution via Custom MCP", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/flowise-before-remote-code-execution-via-custom-mcp"}], "credits": [{"lang": "en", "value": "alex-elttam", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-14T18:59:26.374654Z", "id": "CVE-2026-73601", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-14T20:18:44.625Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73601", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-13T11:15:12.095Z", "datePublished": "2026-08-13T11:28:08.066Z", "dateUpdated": "2026-08-14T20:18:44.625Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-13T11:28:08.066Z"}, "datePublic": "2026-07-29T00:00:00.000Z", "title": "Flowise before 3.1.3 Remote Code Execution via Custom MCP", "descriptions": [{"lang": "en", "value": "Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')", "cweId": "CWE-95", "type": "CWE"}]}], "affected": [{"vendor": "FlowiseAI", "product": "Flowise", "defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "3.1.3"}, {"version": "3.1.3", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "FlowiseAI", "product": "Flowise", "defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise-components", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "3.1.3"}, {"version": "3.1.3", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.1.3"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 9, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-g98q-rm45-q9h8", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-g98q-rm45-q9h8)"}, {"name": "VulnCheck Advisory: Flowise before 3.1.3 Remote Code Execution via Custom MCP", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/flowise-before-remote-code-execution-via-custom-mcp"}], "credits": [{"lang": "en", "value": "alex-elttam", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-73601", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-14T18:59:26.374654Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-14T18:59:27.671Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise", "product": "Flowise", "vendor": "FlowiseAI", "versions": [{"lessThan": "3.1.3", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "3.1.3", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "packageURL": "pkg:npm/flowise-components", "product": "Flowise", "vendor": "FlowiseAI", "versions": [{"lessThan": "3.1.3", "status": "affected", "version": "0", "versionType": "semver"}, {"status": "unaffected", "version": "3.1.3", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*", "matchCriteriaId": "8C8B3FC2-6070-4400-9690-FCBE0C5C1D37", "versionEndExcluding": "3.1.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands."}, {"lang": "es", "value": "Las versiones de Flowise anteriores a la 3.1.3 contienen una vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo en el nodo Custom MCP cuando CUSTOM_MCP_PROTOCOL est\u00e1 configurado como stdio, lo que permite a usuarios autenticados ejecutar comandos arbitrarios manipulando variables de entorno y argumentos de comando. Los atacantes pueden abusar de las variables de entorno PYTHONWARNINGS y BROWSER con python3, o aprovechar el directorio de trabajo ra\u00edz con node para eludir la validaci\u00f3n y ejecutar comandos del sistema."}], "id": "CVE-2026-73601", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.0, "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:P/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": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73601", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-14T18:59:26.374654Z", "version": "2.0.3"}}]}, "published": "2026-08-13T12:17:24.353", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Vendor Advisory"], "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-g98q-rm45-q9h8"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/flowise-before-remote-code-execution-via-custom-mcp"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-95"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.1.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "3.1.3"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "flowise", "vendor": "flowiseai"}], "created": "2026-08-13T12:30:10.768959+00:00", "updated": "2026-08-13T13:30:17.185124+00:00", "vendors": ["flowiseai", "flowiseai$PRODUCT$flowise"]}