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CVE-2026-59208

CVE-2026-59208 · n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution

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

n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.

CVSS 7.6 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • >= 2.28.0, < 2.28.1: Affected
    • < 2.27.4: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.28.0, < 2.28.1

    Update to 2.28.1

  • n8n npm

    Affected ranges
    • SEMVER: < 2.27.4

    Update to 2.27.4

Original sources

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