CVE-2026-59208
7.6
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n8n-io | n8n | >= 2.28.0, < 2.28.1 | affected |
| n8n-io | n8n | < 2.27.4 | affected |
Weaknesses
- CWE-287: CWE-287: Improper Authentication
- CWE-346: CWE-346: Origin Validation Error
References
- 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
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