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CVE-2026-59259

MEDIUM
6.0
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-59259
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-04 12:17 UTC
Published
2026-07-15 11:25 UTC
Last updated
2026-07-15 11:47 UTC
Primary CWE
CWE-639
Authorization Bypass Through User-Controlled Key
Vendor / Product
n8n / n8n
Sources
cve.org  ·  NVD

Severity & Metrics

6.0 MEDIUM CVSS 4.0
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
Affected products (3)
VendorProductPlatformVersions
n8n n8n — 0 < 1.123.61, 1.123.61
n8n n8n — 0 < 2.28.1, 2.28.1
n8n n8n — 0 < 2.27.4, 2.27.4
Weakness (CWE)
CWESourceDescription
CWE-639 cna Authorization Bypass Through User-Controlled Key
CVSS scores (1)
ScoreSeverityVersionSourceVector
6.0 MEDIUM 4.0 cna 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
References (2)
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