CVE-2026-77076 (GCVE-0-2026-77076)
Vulnerability from cvelistv5 – Published: 2026-08-20 11:21 – Updated: 2026-08-21 16:43
VLAI
EPSS
VEX
Title
n8n before 1.123.69 Credential Leak via GraphQL Node Error
Summary
n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n's standard error type. That error contains the live request's headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 16:43 UTC
CWE
- CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/n8n-before-c… | third-party-advisory |
Impacted products
Date Public
2026-08-05 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-77076",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-21T16:43:00.664837Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T16:43:12.650Z",
"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": "1.123.69",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.123.69",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"product": "n8n",
"vendor": "n8n-io",
"versions": [
{
"lessThan": "2.34.1",
"status": "affected",
"version": "2.34.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.34.1",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"product": "n8n",
"vendor": "n8n-io",
"versions": [
{
"lessThan": "2.33.4",
"status": "affected",
"version": "2.0.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.33.4",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.123.69",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.34.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.33.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Masofgon"
}
],
"datePublic": "2026-08-05T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n\u0027s standard error type. That error contains the live request\u0027s headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-209",
"description": "Generation of Error Message Containing Sensitive Information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T11:21:18.839Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-9fqj-7wc5-cwhx)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx"
},
{
"name": "VulnCheck Advisory: n8n before 1.123.69 Credential Leak via GraphQL Node Error",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node-error"
}
],
"title": "n8n before 1.123.69 Credential Leak via GraphQL Node Error",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-77076",
"datePublished": "2026-08-20T11:21:10.251Z",
"dateReserved": "2026-08-20T10:51:39.784Z",
"dateUpdated": "2026-08-21T16:43:12.650Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-77076",
"date": "2026-08-24",
"epss": "0.00287",
"percentile": "0.20605"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-77076\",\"sourceIdentifier\":\"disclosure@vulncheck.com\",\"published\":\"2026-08-20T12:16:38.997\",\"lastModified\":\"2026-08-21T17:16:46.907\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n\u0027s standard error type. That error contains the live request\u0027s headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.\"}],\"affected\":[{\"source\":\"disclosure@vulncheck.com\",\"affectedData\":[{\"vendor\":\"n8n-io\",\"product\":\"n8n\",\"defaultStatus\":\"unaffected\",\"packageURL\":\"pkg:npm/n8n\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.123.69\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"1.123.69\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]},{\"vendor\":\"n8n-io\",\"product\":\"n8n\",\"defaultStatus\":\"unaffected\",\"packageURL\":\"pkg:npm/n8n\",\"versions\":[{\"version\":\"2.34.0\",\"lessThan\":\"2.34.1\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"2.34.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]},{\"vendor\":\"n8n-io\",\"product\":\"n8n\",\"defaultStatus\":\"unaffected\",\"packageURL\":\"pkg:npm/n8n\",\"versions\":[{\"version\":\"2.0.0\",\"lessThan\":\"2.33.4\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"2.33.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-21T16:43:00.664837Z\",\"id\":\"CVE-2026-77076\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"disclosure@vulncheck.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-209\"}]}],\"references\":[{\"url\":\"https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx\",\"source\":\"disclosure@vulncheck.com\"},{\"url\":\"https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node-error\",\"source\":\"disclosure@vulncheck.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-77076\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-21T16:43:00.664837Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-21T16:43:06.687Z\"}}], \"cna\": {\"title\": \"n8n before 1.123.69 Credential Leak via GraphQL Node Error\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Masofgon\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 7.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"n8n-io\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.123.69\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"1.123.69\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"n8n-io\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.34.0\", \"lessThan\": \"2.34.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"2.34.1\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"n8n-io\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.0.0\", \"lessThan\": \"2.33.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"2.33.4\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-08-05T00:00:00.000Z\", \"references\": [{\"url\": \"https://github.com/n8n-io/n8n/security/advisories/GHSA-9fqj-7wc5-cwhx\", \"name\": \"GitHub Security Advisory (GHSA-9fqj-7wc5-cwhx)\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.vulncheck.com/advisories/n8n-before-credential-leak-via-graphql-node-error\", \"name\": \"VulnCheck Advisory: n8n before 1.123.69 Credential Leak via GraphQL Node Error\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"n8n versions before 1.123.69, 2.33.4, and 2.34.1 contain an information disclosure vulnerability in the GraphQL node. When a GraphQL request fails at the connection level, the node re-throws the underlying HTTP client error unchanged instead of wrapping it in n8n\u0027s standard error type. That error contains the live request\u0027s headers, including a decrypted credential secret, which the execution engine persists verbatim. Any authenticated user able to read the resulting execution can retrieve the decrypted credential secret from the stored run data.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-209\", \"description\": \"Generation of Error Message Containing Sensitive Information\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.123.69\"}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.34.1\"}], \"operator\": \"OR\"}]}, {\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.33.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-08-21T11:21:18.839Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-77076\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-21T16:43:12.650Z\", \"dateReserved\": \"2026-08-20T10:51:39.784Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-08-20T11:21:10.251Z\", \"assignerShortName\": \"VulnCheck\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
Loading…
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.
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.
Loading…
Loading…