CVE-2026-59208: n8n

Medium severity, CVSS 6.8. EPSS: 0.3% chance of exploitation in the next 30 days.

n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.

Affected products

• n8n n8n: before 2.27.4 (fixed in 2.27.4); version 2.28.0 only

Published 2026-07-09. Last modified 2026-07-14.