CVE-2026-86073
n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-863 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Sep 8, 2026 |
| Last Updated | Sep 9, 2026 |
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Affected Versions
n8n-io / n8n
< 2.37.7 >= 2.38.0, < 2.38.1
References
github.com: https://github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73 github.com: https://github.com/n8n-io/n8n/pull/37122 github.com: https://github.com/n8n-io/n8n/pull/37588 github.com: https://github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e268475c github.com: https://github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d274d88 github.com: https://github.com/n8n-io/n8n/releases/tag/[email protected] github.com: https://github.com/n8n-io/n8n/releases/tag/[email protected]