CVE-2026-59208 – n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution

CVE ID :CVE-2026-59208

Published : July 9, 2026, 3:27 p.m. | 21 minutes ago

Description :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.

Severity: 0.0 | NA

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