VDB
CVE-2026-59208
CVE-2026-59208
PUBLISHED
CVSS 7.6 HIGH
Reported by GitHub_M · Published July 9, 2026
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.
Risk Scores
CVSS 4.0
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| n8n-io | n8n | >= 2.28.0, < 2.28.1, < 2.27.4 |
| n8n-io | n8n | >= 2.28.0, < 2.28.1, < 2.27.4, >= 2.28.0, < 2.28.1 |
Timeline
- Jul 9, 2026 CVE Published
- Jul 10, 2026 Coalition ESS Score
- Jul 14, 2026 CVE Updated
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w x_refsource_CONFIRM
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4 x_refsource_MISC
- https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1 x_refsource_MISC