CVE-2026-86073

    Dashboard / Vulnerabilities / CVE-2026-86073

    CVE-2026-86073

    Published: 8 Sept 2026Last Modified: 13 Sept 2026

    Summary: n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

    Details: 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.

    References: https://github.com/n8n-io/n8n/releases/tag/[email protected], https://github.com/n8n-io/n8n/releases/tag/[email protected], https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86073.json, https://github.com/n8n-io/n8n/security/advisories/GHSA-cw9w-vv67-hf73, https://nvd.nist.gov/vuln/detail/CVE-2026-86073, https://github.com/n8n-io/n8n/commit/18458482861097a26f874f30ad7e8136e268475c, https://github.com/n8n-io/n8n/commit/380788fd9a3264c83161e868026a98731d274d88, https://github.com/n8n-io/n8n/pull/37122, https://github.com/n8n-io/n8n/pull/37588

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -2a4ca7868dc75edca4c575d6507021e1e6b0ec90

    Affected versions

    2.38.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-86073 | CVE-DB