CVE-2026-56775

MediumCVSS 5.4/10Last modified Oct 29, 2026

Description

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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Weakness enumeration

CWE-863

Affected software

Vendor	Product	Versions
n8n	n8n	< 1.123.55
n8n	n8n	>= 2.26.0, < 2.26.2
n8n	n8n	>= 2.0.0-rc.0, < 2.25.7

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xxMitigation, Vendor Advisory
https://www.vulncheck.com/advisories/n8n-incorrect-oauth-scope-validation-in-evaluation-test-runs-endpointsThird Party Advisory

Timeline

Published: Jul 8, 2026
Last modified: Oct 29, 2026
NVD status: Analyzed

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