CVE-2026-54306

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

• Avoid exposing public (unauthenticated) webhook workflows that pass incoming data through transform nodes into action nodes with sensitive credentials or database operations.
• Limit workflow creation and editing permissions to fully trusted users only.

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

A prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes.

Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy, targeting unintended records or issuing outbound requests using the workflow owner's configured credentials.

CVE-2026-54306 has a CVSS score of 5.4 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.26.2, 2.25.7); upgrading removes the vulnerable code path.

Kodem intelligence

The issue has been fixed in n8n versions 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability.

1. What is CVE-2026-54306? CVE-2026-54306 is a medium-severity security vulnerability in n8n (npm), affecting versions >= 2.26.0, < 2.26.2. It is fixed in 2.26.2, 2.25.7.
2. How severe is CVE-2026-54306? CVE-2026-54306 has a CVSS score of 5.4 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of n8n are affected by CVE-2026-54306? n8n (npm) versions >= 2.26.0, < 2.26.2 is affected.
4. Is there a fix for CVE-2026-54306? Yes. CVE-2026-54306 is fixed in 2.26.2, 2.25.7. Upgrade to this version or later.
5. Is CVE-2026-54306 exploitable, and should I be worried? Whether CVE-2026-54306 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-54306 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-54306?
   • Upgrade n8n to 2.26.2 or later
   • Upgrade n8n to 2.25.7 or later