CVE-2026-56776 (GCVE-0-2026-56776)
Vulnerability from cvelistv5
Published
2026-07-08 13:49
Modified
2026-10-29 21:15
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
7.4 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
7.4 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
VLAI Severity ?
EPSS score ?
CWE
- CWE-863 - Incorrect Authorization
Summary
n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a workflow can trigger a real evaluation test run, causing the workflow to execute via the internal workflow runner and resulting in unintended outbound API calls, data mutations, or other side effects in connected downstream systems. The issue primarily affects instances using the Evaluations feature where RBAC project roles grant workflow:read without workflow:execute.
References
| URL | Tags | |
|---|---|---|
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-56776",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-09T13:38:00.557561Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T14:55:45.087Z",
"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",
"versions": [
{
"lessThan": "1.123.55",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.123.55",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"product": "n8n",
"vendor": "n8n",
"versions": [
{
"lessThan": "2.26.2",
"status": "affected",
"version": "2.26.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.26.2",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"product": "n8n",
"vendor": "n8n",
"versions": [
{
"lessThan": "2.25.7",
"status": "affected",
"version": "2.0.0-rc.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "2.25.7",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
"versionEndExcluding": "1.123.55",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
"versionEndExcluding": "2.26.2",
"versionStartIncluding": "2.26.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
"versionEndExcluding": "2.25.7",
"versionStartIncluding": "2.0.0-rc.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "34selen"
}
],
"datePublic": "2026-06-10T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a workflow can trigger a real evaluation test run, causing the workflow to execute via the internal workflow runner and resulting in unintended outbound API calls, data mutations, or other side effects in connected downstream systems. The issue primarily affects instances using the Evaluations feature where RBAC project roles grant workflow:read without workflow:execute."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-863",
"description": "Incorrect Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-29T21:15:59.462Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-hv7x-3x78-gx53)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-hv7x-3x78-gx53"
},
{
"name": "VulnCheck Advisory: n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-workflow-test-run-endpoint"
}
],
"title": "n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-56776",
"datePublished": "2026-07-08T13:49:06.971Z",
"dateReserved": "2026-06-23T01:22:22.571Z",
"dateUpdated": "2026-10-29T21:15:59.462Z",
"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-2026-56776\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-09T13:38:00.557561Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-09T13:38:07.436Z\"}}], \"cna\": {\"title\": \"n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"34selen\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"LOW\", \"vulnAvailabilityImpact\": \"LOW\", \"subConfidentialityImpact\": \"LOW\", \"vulnConfidentialityImpact\": \"LOW\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"n8n\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.123.55\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"1.123.55\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"n8n\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.26.0\", \"lessThan\": \"2.26.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"2.26.2\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"n8n\", \"product\": \"n8n\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.0.0-rc.0\", \"lessThan\": \"2.25.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"2.25.7\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:npm/n8n\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-06-10T00:00:00.000Z\", \"references\": [{\"url\": \"https://github.com/n8n-io/n8n/security/advisories/GHSA-hv7x-3x78-gx53\", \"name\": \"GitHub Security Advisory (GHSA-hv7x-3x78-gx53)\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-workflow-test-run-endpoint\", \"name\": \"VulnCheck Advisory: n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization bypass in the POST /workflows/{workflowId}/test-runs/new endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a workflow can trigger a real evaluation test run, causing the workflow to execute via the internal workflow runner and resulting in unintended outbound API calls, data mutations, or other side effects in connected downstream systems. The issue primarily affects instances using the Evaluations feature where RBAC project roles grant workflow:read without workflow:execute.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"Incorrect Authorization\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.123.55\"}, {\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.26.2\", \"versionStartIncluding\": \"2.26.0\"}, {\"criteria\": \"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2.25.7\", \"versionStartIncluding\": \"2.0.0-rc.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-10-29T21:15:59.462Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-56776\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-29T21:15:59.462Z\", \"dateReserved\": \"2026-06-23T01:22:22.571Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-07-08T13:49:06.971Z\", \"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…