CVE-2026-110848 (GCVE-0-2026-110848)
Vulnerability from cvelistv5
Published
2026-10-14 22:52
Modified
2026-10-16 17:14
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Summary
n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart.
References
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-110848",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T16:31:15.592926Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-16T17:14:56.072Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"product": "n8n",
"vendor": "n8n-io",
"versions": [
{
"lessThan": "1.123.83",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "2.41.4",
"status": "affected",
"version": "2.0.0",
"versionType": "semver"
},
{
"lessThan": "2.42.1",
"status": "affected",
"version": "2.42.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.123.83",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.41.4",
"versionStartIncluding": "2.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.42.1",
"versionStartIncluding": "2.42.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "vonypeto"
}
],
"datePublic": "2026-09-30T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1321",
"description": "Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-14T22:52:23.952Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-3p2g-2wpm-8h3g)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g"
},
{
"name": "VulnCheck Advisory: n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-prototype-pollution-via-ai-workflow-builder-connection-merge"
}
],
"title": "n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-110848",
"datePublished": "2026-10-14T22:52:23.952Z",
"dateReserved": "2026-10-14T22:12:22.055Z",
"dateUpdated": "2026-10-16T17:14:56.072Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-110848\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-16T16:31:15.592926Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-16T16:31:16.270Z\"}}], \"cna\": {\"title\": \"n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"vonypeto\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"n8n-io\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.123.83\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.0.0\", \"lessThan\": \"2.41.4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"2.42.0\", \"lessThan\": \"2.42.1\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-09-30T00:00:00.000Z\", \"references\": [{\"url\": \"https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g\", \"name\": \"GitHub Security Advisory (GHSA-3p2g-2wpm-8h3g)\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-prototype-pollution-via-ai-workflow-builder-connection-merge\", \"name\": \"VulnCheck Advisory: n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1321\", \"description\": \"Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.123.83\"}, {\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.41.4\", \"versionStartIncluding\": \"2.0.0\"}, {\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.42.1\", \"versionStartIncluding\": \"2.42.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-10-14T22:52:23.952Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-110848\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-16T17:14:56.072Z\", \"dateReserved\": \"2026-10-14T22:12:22.055Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-10-14T22:52:23.952Z\", \"assignerShortName\": \"VulnCheck\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…