CVE-2026-126388
Deferred Deferred - Pending Action

Credential Exposure in n8n Workflow Automation Tool

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
n8n before 2.46.1 contains a credential exposure vulnerability that forwards Authorization headers and basic auth credentials on cross-origin redirects because sendCredentialsOnCrossOriginRedirect defaults to true. Attackers controlling a redirect target or an expression-fed URL in credential-using nodes can capture stored workflow credentials sent to their endpoint.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126388
EUVD
EUVD-2026-125177

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
n8n n8n to 2.46.1 (exc)
n8n n8n to 2.45.5 (exc)
n8n n8n to 3.0.1 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-522 The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

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Executive Summary

This vulnerability affects n8n versions before 2.46.1, where stored workflow credentials are exposed during cross-origin redirects. The default setting sendCredentialsOnCrossOriginRedirect forwards Authorization headers and basic auth credentials to redirected endpoints. Attackers controlling redirect targets or manipulating URLs can capture these credentials.

Detection Guidance

To detect this vulnerability, check if your n8n instance is running a vulnerable version (2.46.0 or below, below 2.45.5, or below 3.0.1). Inspect network traffic for cross-origin redirects involving credential-using nodes. Look for Authorization headers or basic auth credentials being forwarded to unexpected destinations.

Impact Analysis

If exploited, attackers could steal stored credentials used in n8n workflows. This may lead to unauthorized access to systems, data breaches, or further attacks leveraging the exposed credentials. The impact depends on the privileges of the compromised credentials.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR (data protection) and HIPAA (health data security) by exposing sensitive credentials and potentially allowing unauthorized access to personal or health data. Organizations must remediate it to maintain regulatory compliance.

Mitigation Strategies

Upgrade n8n to version 2.46.1, 2.45.5, or 3.0.1 or later. Restrict n8n access to trusted users only. Audit workflows for untrusted input in URLs or redirect targets. Apply network-level controls to restrict outbound requests and enable SSRF protection. Rotate any exposed credentials immediately.

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