Vulnerability · Published Jul 15, 2026 · Assigned by VulnCheck

CVE-2026-59254n8n - External Secrets Disclosure via Workflow Node Expressions

Medium 6.3

In plain English

A medium-severity authorization bypass via user-controlled key in n8n from n8n. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.4%top 69.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.28.1	GHSA-2434-3x6q-8r99
npm	n8n	2.27.4	GHSA-2434-3x6q-8r99

Affected products (as reported)

Vendor	Product	Versions
n8n	n8n	2.28.0 – before 2.28.1
n8n	n8n	0 – before 2.27.4

Weakness: CWE-639 · Vector: 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

References

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