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TI-2026-40942 Aliases CVE-2026-56778GHSA-g7vr-5v44-rqf5

n8n - Authorization Bypass in Public API Execution Retry Endpoint

Priority LOW 24CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00295 22nd percentileScored 2026-11-07
Fix Fixed n8n (n8n): 2.26.2, 2.25.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
n8nn8n2.26.0 to before 2.26.22.26.2Patch availableCNA
n8nn8nbefore 2.25.72.25.7Patch availableCNA
  • n8n Vendorn8n Affected 2.26.0 to before 2.26.2 Fixed in 2.26.2 Patch available CNA
  • n8n Vendorn8n Affected before 2.25.7 Fixed in 2.25.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*before 2.25.7; 2.26.0 to before 2.26.2Vulnerablen8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 2.25.7; 2.26.0 to before 2.26.2 Vulnerable ·n8n

Remediation

  • Fix · CNA n8n (n8n) Fixed in 2.26.2
  • Fix · CNA n8n (n8n) Fixed in 2.25.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    n8n 2.25.7, 2.26.2

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-40940 n8n - Incorrect OAuth Scope Validation in Workflow Test Run EndpointPriority LOW 24
    • TI-2026-40939 n8n - Incorrect OAuth Scope Validation in Evaluation Test Runs EndpointsPriority LOW 24
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56778
  2. 2026-10-03 Alias added: GHSA-g7vr-5v44-rqf5
  3. 2026-10-29 Affected versions changed · CNA

References

Advisory 1

  • TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
  • TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
  • TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
  • TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
  • TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8
See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences