Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | < 2.27.4 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4Release Notes
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1Release Notes
- https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579wVendor Advisory
FAQ
What is CVE-2026-59208?
CVE-2026-59208 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 identit...
How severe is CVE-2026-59208?
CVE-2026-59208 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59208?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.