How severe is CVE-2026-56776?

CVE-2026-56776 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-56776 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

What products are affected by CVE-2026-56776?

CVE-2026-56776 affects N8n. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56776?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-56776 published?

CVE-2026-56776 was published on 2026-07-08.

CVE-2026-56776

CVE-2026-56776 is a high-severity vulnerability in N8n with a CVSS 3.x base score of 7.4. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v4: 5.3
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: N8n
Published: 2026-07-08
Last modified: 2026-07-08

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.

Frequently asked questions

What is CVE-2026-56776?: 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.
How severe is CVE-2026-56776?: CVE-2026-56776 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-56776 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
What products are affected by CVE-2026-56776?: CVE-2026-56776 affects N8n. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56776?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-56776 published?: CVE-2026-56776 was published on 2026-07-08.

References

Affected products (1)

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*

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