TI-2026-53826 Aliases CVE-2026-77073 GHSA-hf5p-745p-2j3h

n8n before 2.34.1 Cross-Project Credential Access via MCP

LOW 32CWE-639Published 2026-08-20 · Updated 2026-08-25

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

n8n versions before 2.34.1 contain a credential validation bypass in the MCP create_workflow_from_code tool when authentication type is set to an expression. Attackers with a valid MCP Bearer API key and knowledge of a target credential ID can persist unauthorized cross-project credential references on workflows in different projects.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00345 28th percentileScored 2026-11-07

Fix Fixed n8n (n8n-io): 2.34.1, 2.33.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	2.34.0 to before 2.34.1	2.34.1	Patch available	CNA
n8n	n8n	2.0.0 to before 2.33.4	2.33.4	Patch available	CNA

n8n Vendorn8n Affected 2.34.0 to before 2.34.1 Fixed in 2.34.1 Patch available CNA
n8n Vendorn8n Affected 2.0.0 to before 2.33.4 Fixed in 2.33.4 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	before 2.33.4	Vulnerable	n8n
cpe:2.3:a:n8n:n8n:2.34.0:::::node.js::	2.34.0	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 2.33.4 Vulnerable ·n8n
cpe:2.3:a:n8n:n8n:2.34.0:*:*:*:*:node.js:*:* Versions 2.34.0 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 2.34.1
Fix · CNA n8n (n8n-io) Fixed in 2.33.4

Fixed in the same release

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

Release · 2026-08-20
n8n-io n8n 2.33.4, 2.34.1
17 records Highest priority Priority MEDIUM 2 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2026-53821 n8n before 2.34.1 Remote Code Execution via Path TraversalPriority MEDIUM 41
- TI-2026-53833 n8n before 1.123.69 Arbitrary File Read and Write via SnowflakePriority MEDIUM 40
- TI-2026-53832 n8n before 2.34.1 Authorization Bypass via Custom Role DeletionPriority LOW 39
Show all 17 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-77073
2026-10-03 Alias added: GHSA-hf5p-745p-2j3h

References

Advisory 1

GitHub Security Advisory (GHSA-vfrj-582q-mvcp)

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