| Component | n8n |
| Severity | medium (CVSS 6.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
| Published (NVD) | 2026-07-09 |
| Last modified | 2026-07-14 |
| Affected versions | n8n < 2.27.4 n8n = 2.28.0 |
| Fixed in | 2.27.4 |
| Weakness | CWE-287CWE-346 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.27.4or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-59208
- https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1
Read more
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