CVE-2026-59254

n8n - External Secrets Disclosure via Workflow Node Expressions

State: Published
Severity: 6.3 Medium
Published: Jul 15, 2026
Updated: Oct 29, 2026
Reserved: Jul 4, 2026

Description

n8n before 2.28.1 contains an information disclosure vulnerability where external secrets are incorrectly resolved in workflow node expressions outside credentials scope. Authenticated project editors can read plaintext external secret values by referencing them in node expressions without requiring explicit secrets access permissions.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N	VulnCheck

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
n8nn8n	2.28.0 to before 2.28.1Affected 2.28.1Not affected
n8nn8n	before 2.27.4Affected 2.27.4Not affected

References

GitHub Security Advisory (GHSA-2434-3x6q-8r99)vendor-advisory
VulnCheck Advisory: n8n - External Secrets Disclosure via Workflow Node Expressionsthird-party-advisory

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