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Vulnerability record · CVE-2026-86073 · published 8 September 2026

CVE-2026-86073: N8n incorrect authorization vulnerability

N8n · N8n

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.

5.9 CVSS 4.0 Medium EPSS 0.39% · top 69.1% CWE-863 · Incorrect authorization
5.9CVSS 4.0 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
11 Sep 2026Last modified by 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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e268475c Patch
https://github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d274d88 Patch
https://github.com/n8n-io/n8n/pull/37122 Issue Tracking
https://github.com/n8n-io/n8n/pull/37588 Issue Tracking
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 Release Notes
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.1 Release Notes
https://github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73 MitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-86073), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.