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.
Problem types
CWE-287: Improper Authentication
CWE-346: Origin Validation Error
Product status
< 2.27.4
References
github.com/...io/n8n/security/advisories/GHSA-mq3m-f8x3-579w
github.com/n8n-io/n8n/releases/tag/n8n@2.27.4
github.com/n8n-io/n8n/releases/tag/n8n@2.28.1