🛡️ CVE-2026-56775 — n8n

🟡 CVSS 5.4 — Medium ✅ No Known Exploit CWE-863 OSV
5.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

n8n: Wrong OAuth Scope on Evaluation Test Runs Endpoints

Impact

Three mutating endpoints in the evaluation test runs controller authorized state-changing actions using workflow:read instead of the action-appropriate workflow:execute scope. An authenticated user with project:viewer role on a project could start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only had read access to.

This issue only affects instances with Advanced Permissions (Enterprise/Cloud) where projects and viewer roles are in use.

Patches

The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • Restrict project membership to fully trusted users only.
  • Avoid granting viewer access to projects containing sensitive workflows.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity low, availability low.

Weakness class

CVE-2026-56775 is classified as CWE-863: Incorrect Authorization. An authorisation check runs but reaches the wrong conclusion, permitting actions it should refuse.

Affected software

CVE-2026-56775 is recorded against 1 package.

  • n8n

Timeline and source

Published on 17 June 2026 and last revised on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
github.com (Package)

Details

Severity MEDIUM
CVSS Score 5.4
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:N
CWE CWE-863
Public Exploit ✅ No
Source OSV
Published 2026-06-17
Updated 2026-08-12
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
n8n — —

Similar Threats

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