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CVE-2026-45732

CVE-2026-45732 · n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints

This page contains facts from public vulnerability sources. Check the original advisory before updating.

n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, the OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.

CVSS 8.3 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • < 1.123.43: Affected
    • >= 2.0.0-rc.0, < 2.20.7: Affected
    • >= 2.21.0, < 2.21.1: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: < 1.123.43

    Update to 1.123.43

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.21.0, < 2.21.1

    Update to 2.21.1

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.0.0-rc.0, < 2.20.7

    Update to 2.20.7

Original sources

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