CVE-2026-59208

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 Vector

Affected Products

References

• https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
• https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1
• https://github.com/n8n-io/n8n/security/advisories/GHSA-mq3m-f8x3-579w