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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | >= 2.28.0, < 2.28.1, < 2.27.4 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | n8n | >= 2.28.0, < 2.28.1 | 2.28.1 | GHSA-mq3m-f8x3-579w |
| npm | n8n | < 2.27.4 | 2.27.4 | GHSA-mq3m-f8x3-579w |
Advisories 2
- WID-SEC-2026-2067 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 15, 2026
- NCSC-2026-0228 Kwetsbaarheden verholpen in n8n workflow automation platform NCSC-NL (Netherlands) · Jul 13, 2026