CVE-2026-86073
highn8n is an open source workflow automation platform.
Vendor / product: 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e268475c security-advisories@github.com
- https://github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d274d88 security-advisories@github.com
- https://github.com/n8n-io/n8n/pull/37122 security-advisories@github.com
- https://github.com/n8n-io/n8n/pull/37588 security-advisories@github.com
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 security-advisories@github.com
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.1 security-advisories@github.com
- https://github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73 security-advisories@github.com