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CVE-2026-54311

CVE-2026-54311 · n8n: Merge Node SQL Mode Prototype Pollution

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

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, an authenticated user with permission to create or modify workflows could pollute the sandbox used by the Merge node's SQL Query mode. Because the sandbox context was cached and reused across all workflow executions on the instance, prototype mutations introduced by one user's workflow persist into subsequent Merge SQL executions belonging to other users or projects. This allowed a low-privileged attacker to intercept workflow data processed by other users on the same instance. This issue only affects multi-user n8n instances where more than one user has permission to create and execute workflows containing the Merge node in SQL Query mode. This vulnerability is fixed in 2.25.7 and 2.26.2.

CVSS 6.0 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n

    Versions
    • >= 2.26.0, < 2.26.2: Affected
    • < 2.25.7: Affected

    No fix published

  • n8n npm

    Affected ranges
    • SEMVER: ≥ 2.26.0, < 2.26.2

    Update to 2.26.2

  • n8n npm

    Affected ranges
    • SEMVER: < 2.25.7

    Update to 2.25.7

Original sources

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