CVE-2026-56776 (GCVE-0-2026-56776)

Vulnerability from cvelistv5 – Published: 2026-07-08 13:49 – Updated: 2026-07-09 14:55
VLAI
Title
n8n - Incorrect OAuth Scope Validation in Workflow Test Run Endpoint
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.
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
n8n n8n Affected: 0 , < 1.123.55 (semver)
Unaffected: 1.123.55 (semver)
Create a notification for this product.
n8n n8n Affected: 0 , < 2.26.2 (semver)
Unaffected: 2.26.2 (semver)
Create a notification for this product.
n8n n8n Affected: 0 , < 2.25.7 (semver)
Unaffected: 2.25.7 (semver)
Create a notification for this product.
Date Public
2026-06-10 00:00
Credits
34selen
Show details on NVD website
To clipboard 

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Sightings

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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.
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Detection rules are retrieved from Rulezet.