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.
Metrics
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History
Wed, 09 Sep 2026 17:30:00 +0000
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ssvc
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Tue, 08 Sep 2026 17:15:00 +0000
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| 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. | |
| Title | n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution | |
| Weaknesses | CWE-863 | |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-08T17:01:24.441Z
Updated: 2026-09-09T15:58:40.814Z
Reserved: 2026-09-04T19:34:03.100Z
Link: CVE-2026-86073
Updated: 2026-09-09T15:58:37.999Z
Status : Awaiting Analysis
Published: 2026-09-08T17:18:39.167
Modified: 2026-09-09T20:16:54.383
Link: CVE-2026-86073
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