| Component | n8n |
| Severity | high (CVSS 7.6) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L |
| Published (NVD) | 2026-09-08 |
| Last modified | 2026-09-11 |
| Affected versions | n8n < 2.37.7 n8n = 2.38.0 |
| Fixed in | 2.37.7 |
| Weakness | CWE-863 |
| CISA KEV | not listed |
NVD description
n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it matched the original grant. An OAuth client approved for one workflow could substitute a different workflow URL in the resource parameter and obtain a valid token for an unapproved workflow accessible to the consenting user. This issue is fixed in versions 2.37.7 and 2.38.1.
What to do
- Upgrade n8n to
2.37.7or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-86073
- https://github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73
- https://github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e268475c
- https://github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d274d88
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
- https://github.com/n8n-io/n8n/releases/tag/[email protected]
- https://github.com/n8n-io/n8n/pull/37122
- https://github.com/n8n-io/n8n/pull/37588
Read more
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