n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization vulnerability in three mutating evaluation test-run endpoints that authorize state-changing actions using the workflow:read scope instead of the action-appropriate workflow:execute scope. On instances using Advanced Permissions (Enterprise/Cloud) with projects and viewer roles, an authenticated user with the project:viewer role can start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only have read access to.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56775.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.123.55"
},
{
"introduced": "2.0.0"
},
{
"fixed": "2.25.7"
},
{
"introduced": "2.26.0"
},
{
"fixed": "2.26.2"
}
],
"cpe": "cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*",
"source": "CPE_RANGE"
}