CVE-2026-103251

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103251", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-30T10:52:32.249Z", "datePublished": "2026-10-01T10:41:57.207Z", "dateUpdated": "2026-10-01T19:24:52.192Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-01T10:41:57.207Z"}, "datePublic": "2026-09-16T00:00:00.000Z", "title": "n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub", "descriptions": [{"lang": "en", "value": "n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Missing Authorization", "cweId": "CWE-862", "type": "CWE"}]}], "affected": [{"vendor": "n8n-io", "product": "n8n", "defaultStatus": "unaffected", "packageURL": "pkg:npm/n8n", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "1.123.80"}, {"version": "2.0.0", "status": "affected", "versionType": "semver", "lessThan": "2.39.6"}, {"version": "2.40.0", "status": "affected", "versionType": "semver", "lessThan": "2.40.1"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.123.80"}, {"vulnerable": true, "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.0.0", "versionEndExcluding": "2.39.6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.40.0", "versionEndExcluding": "2.40.1"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-fmmv-p585-7c8x", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-fmmv-p585-7c8x)"}, {"name": "VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-package-install-validation-bypass-via-pubsub"}], "credits": [{"lang": "en", "value": "AyushParkara", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-01T19:24:38.377060Z", "id": "CVE-2026-103251", "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": "2026-10-01T19:24:52.192Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-103251", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-01T19:24:38.377060Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-01T19:24:46.705Z"}}], "cna": {"title": "n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub", "credits": [{"lang": "en", "type": "reporter", "value": "AyushParkara"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "baseScore": 7.5, "attackVector": "ADJACENT", "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": "0", "lessThan": "1.123.80", "versionType": "semver"}, {"status": "affected", "version": "2.0.0", "lessThan": "2.39.6", "versionType": "semver"}, {"status": "affected", "version": "2.40.0", "lessThan": "2.40.1", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}], "datePublic": "2026-09-16T00:00:00.000Z", "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-fmmv-p585-7c8x", "name": "GitHub Security Advisory (GHSA-fmmv-p585-7c8x)", "tags": ["vendor-advisory"]}, {"url": "https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-package-install-validation-bypass-via-pubsub", "name": "VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 Package Install Validation Bypass via PubSub", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "vulncheck-endgame"}, "descriptions": [{"lang": "en", "value": "n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-862", "description": "Missing Authorization"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "1.123.80"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.39.6", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.40.1", "versionStartIncluding": "2.40.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-01T10:41:57.207Z"}}}, "cveMetadata": {"cveId": "CVE-2026-103251", "state": "PUBLISHED", "dateUpdated": "2026-10-01T19:24:52.192Z", "dateReserved": "2026-09-30T10:52:32.249Z", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "datePublished": "2026-10-01T10:41:57.207Z", "assignerShortName": "VulnCheck"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:npm/n8n", "product": "n8n", "vendor": "n8n-io", "versions": [{"lessThan": "1.123.80", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "2.39.6", "status": "affected", "version": "2.0.0", "versionType": "semver"}, {"lessThan": "2.40.1", "status": "affected", "version": "2.40.0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a validation bypass vulnerability in the community package installation handler for queue mode deployments. Attackers with Redis write access can bypass name validation, permission checks, checksum verification, and npm safety checks to install arbitrary npm packages across all cluster instances without authentication."}], "id": "CVE-2026-103251", "lastModified": "2026-10-01T20:17:22.713", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.5, "baseSeverity": "HIGH", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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-2026-103251", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-01T19:24:38.377060Z", "version": "2.0.3"}}]}, "published": "2026-10-01T11:17:18.973", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-fmmv-p585-7c8x"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-package-install-validation-bypass-via-pubsub"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.123.80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.39.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.40.0,2.40.1)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n8n", "source": "cna", "vendor": "n8n-io"}, "product": "n8n", "vendor": "n8n"}], "created": "2026-10-01T12:30:07.587139+00:00", "updated": "2026-10-01T14:45:09.377536+00:00", "vendors": ["n8n", "n8n$PRODUCT$n8n"]}