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.
Affected products
n8n: n8n
References7
- github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73 MitigationVendor Advisory
- github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e2… Patch
- github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d… Patch
- github.com/n8n-io/n8n/pull/37122 Issue Tracking
- github.com/n8n-io/n8n/pull/37588 Issue Tracking
- github.com/n8n-io/n8n/releases/tag/[email protected] Release Notes
- github.com/n8n-io/n8n/releases/tag/[email protected] Release Notes
Metrics
- CVSS 3.1
-
7.6
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L - CVSS 4.0
-
5.9
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 33 · as of 3 November 2026
- CWE
- CWE-863
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