CVE-2026-86075

    Dashboard / Vulnerabilities / CVE-2026-86075

    CVE-2026-86075

    Published: 8 Sept 2026Last Modified: 13 Sept 2026

    Summary: n8n: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint

    Details: n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.

    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-2026-86075.json, https://github.com/n8n-io/n8n/security/advisories/GHSA-hh89-3r9w-qj3j, https://nvd.nist.gov/vuln/detail/CVE-2026-86075

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -2a4ca7868dc75edca4c575d6507021e1e6b0ec90

    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-2026-86075 | CVE-DB