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CVE-2026-56776

HIGH
7.4
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-56776
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-23 01:22 UTC
Published
2026-07-08 13:49 UTC
Last updated
2026-07-08 13:49 UTC
Primary CWE
CWE-863
Incorrect Authorization
Vendor / Product
n8n / n8n
Sources
cve.org  ·  NVD

Severity & Metrics

7.4 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Affected products (3)
VendorProductPlatformVersions
n8n n8n — 0 < 1.123.55, 1.123.55
n8n n8n — 0 < 2.26.2, 2.26.2
n8n n8n — 0 < 2.25.7, 2.25.7
Weakness (CWE)
CWESourceDescription
CWE-863 cna Incorrect Authorization
CVSS scores (2)
ScoreSeverityVersionSourceVector
7.4 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
5.3 MEDIUM 4.0 cna 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
References (2)
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