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EUVD-2026-277483

fkie_cve-2026-33696

n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.27, an authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the XML and the GSuiteAdmin nodes. By supplying a crafted parameters as part of node configuration, an attacker could write attacker-controlled values onto `Object.prototype`. An attacker could use this prototype pollution to achieve remote code execution on the n8n instance. The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.27. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Limit workflow creation and editing permissions to fully trusted users only, and/or disable the XML node by adding `n8n-nodes-base.xml` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

GHSA-mxrg-77hm-89hv — n8n: Prototype Pollution in XML and GSuiteAdmin node parameters lead to RCE

Affected: npm: n8n

## Impact An authenticated user with permission to create or modify workflows could exploit a prototype pollution vulnerability in the GSuiteAdmin node. By supplying a crafted parameter as part of node configuration, an attacker could write attacker-controlled values onto `Object.prototype`. An attacker could use this prototype pollution to achieve remote code execution on the n8n instance.

## Patches The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.27. Users should upgrade to one of these versions or later to remediate the vulnerability.

## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Disable the XML node by adding `n8n-nodes-base.xml` to the `NODES_EXCLUDE` environment variable.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

WID-SEC-W-2026-0877 — n8n: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in n8n ausnutzen, um erweiterte Privilegien, einschließlich Administratorrechte, zu erlangen, um beliebigen Code auszuführen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen oder Cross-Site- und Man-in-the-Middle-Angriffe durchzuführen.