CVE-2026-59208
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
N8n
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-287Improper authenticationCWE-346CWE-346
How to fix
Update
- n8n n8n2.27.4 or later
- n8n2.28.1, 2.27.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n n8n | v < 2.27.4, 2.28.0 | 2.27.4 |
| n8nnpm | 2.28.0 ≤ v < 2.28.1, v < 2.27.4 | 2.28.1, 2.27.4 |
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