high7.6
CVE-2026-59208
n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | n8n | >= 2.28.0, < 2.28.1 | 2.28.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| N8n | N8n | before 2.27.4 Version 2.28.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-mq3m-f8x3-579w
- https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w
- https://nvd.nist.gov/vuln/detail/CVE-2026-59208
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.27.4
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.28.1
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1