Skip to main content

n8n CVE-2026-59259

| EUVDEUVD-2026-44635 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-07-15 VulnCheck GHSA-q6mx-qvhp-fqmg
Authentication Bypass N8n
6.0
CVSS 4.0 · Vendor: VulnCheck
Share

Severity by source

Vendor (VulnCheck) PRIMARY
6.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.5 MEDIUM

Network-exploitable with low-privilege auth; AC:L because once prerequisites exist the attack requires no special complexity; C:H for full secret disclosure; no integrity or availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Patch available
Jul 15, 2026 - 13:03 EUVD
Analysis Generated
Jul 15, 2026 - 12:36 vuln.today

DescriptionCVE.org

n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secrets handling caused by a mismatch between the static validation check and the runtime expression engine. An authenticated user with credential create or update permissions but without the externalSecret:list scope can embed external secret references into credentials in forms the static validation does not detect; these references resolve at workflow execution time, exposing secret values the user is not authorized to access. This issue only affects instances where an external secrets provider is configured and Advanced Permissions are in use.

AnalysisAI

Permission bypass in n8n's external secrets handling allows authenticated low-privilege users to exfiltrate secrets they are not authorized to access by exploiting a mismatch between the platform's static validation layer and its runtime expression engine. Affected are all n8n instances running versions before 1.123.61 (1.x branch), 2.27.4, or 2.28.1 (2.x branch) that have both an external secrets provider and Advanced Permissions configured. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate as low-privilege n8n user
Delivery
Craft credential embedding external secret reference expressions
Exploit
Submit credential via create/update form bypassing static validation
Execution
Trigger or await workflow execution using tampered credential
Persist
Runtime engine resolves secret references
Impact
Retrieve exposed secret values from execution output
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated n8n account (PR:L) with credential create or update permissions but without the externalSecret:list scope - a specific RBAC configuration that can only exist when Advanced Permissions are enabled, since that feature is what introduces fine-grained scope controls. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base score of 6.0 reflects a medium-severity finding, driven primarily by AT:P (Attack Requirements: Present) - meaning specific non-default infrastructure conditions must exist. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated n8n user holding credential create or update permissions - but explicitly denied the externalSecret:list scope by an administrator - crafts a credential payload embedding external secret references using an expression syntax form that the static permission check does not recognize. The credential is saved without triggering an authorization error. …
Remediation The primary fix is to upgrade n8n to version 1.123.61 (for 1.x deployments), 2.27.4, or 2.28.1 (for 2.x deployments), as released by the vendor and documented in advisory GHSA-jp7m-xcgx-57qm at https://github.com/n8n-io/n8n/security/advisories/GHSA-jp7m-xcgx-57qm. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Threat intelligence, references, and detailed analysis are available after sign-in.

More in N8n

View all
CVE-2026-21877 CRITICAL POC
9.9 Jan 08

n8n workflow automation (through 1.121.2) allows authenticated users to execute arbitrary code via the n8n service, with
CVE-2026-21858 CRITICAL POC
10.0 Jan 08

n8n workflow automation (1.65.0 to 1.121.0) allows unauthenticated file access through form-based workflows. A critical

CVE-2026-1470 CRITICAL POC
9.9 Jan 27

n8n has a fifth critical RCE vulnerability (CVSS 9.9) in the Expression evaluator, enabling code execution through craft
CVE-2026-33660 CRITICAL POC
9.4 Mar 25

An authenticated user with workflow creation or modification privileges in n8n workflow automation platform can exploit

CVE-2026-33665 HIGH POC
8.8 Mar 25

Authenticated n8n users can hijack administrator accounts when LDAP authentication is enabled by manipulating their LDAP
CVE-2023-27563 HIGH POC
8.8 May 10

The n8n package 0.218.0 for Node.js allows Escalation of Privileges. Rated high severity (CVSS 8.8), this vulnerability

CVE-2026-0863 HIGH POC
8.5 Jan 18

Authenticated users can exploit string formatting and exception handling in n8n's Python task executor to escape sandbox
CVE-2023-27564 HIGH POC
7.5 May 10

The n8n package 0.218.0 for Node.js allows Information Disclosure. Rated high severity (CVSS 7.5), this vulnerability is
CVE-2023-27562 MEDIUM POC
6.5 May 10

The n8n package 0.218.0 for Node.js allows Directory Traversal. Rated medium severity (CVSS 6.5), this vulnerability is

CVE-2026-33724 MEDIUM POC
6.3 Mar 25

n8n versions prior to 2.5.0 contain a critical SSH host key verification bypass in the Source Control feature that allow
CVE-2026-33720 MEDIUM POC
6.3 Mar 25

This vulnerability in n8n (an open-source workflow automation platform) is an authentication bypass in the OAuth callbac
CVE-2026-27577 CRITICAL
9.9 Feb 25

Additional expression evaluation exploits in n8n before 2.10.1/2.9.3/1.123.22. Fourth distinct code execution path throu

Same weakness CWE-639 – Authorization Bypass Through User-Controlled Key

View all
CVE-2024-50483 CRITICAL
9.8
CVE-2026-55255 HIGH POC
8.4
CVE-2025-3605 CRITICAL POC
9.8
CVE-2022-3805 HIGH POC
8.6
CVE-2025-5947 CRITICAL POC
9.8
CVE-2020-36923 CRITICAL POC
9.8
CVE-2023-3048 CRITICAL POC
9.8
CVE-2024-27730 CRITICAL POC
9.8

Same technique Authentication Bypass

View all
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2012-1723 CRITICAL POC
9.8
CVE-2017-10271 HIGH POC
7.5
CVE-2015-1427 CRITICAL POC
9.8
CVE-2025-3248 CRITICAL POC
9.8

Share

CVE-2026-59259 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy