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CVE-2026-86076

8.8, high

N8n-io n8n Code Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.8% higher than 55.4% of scored CVEs
Exploitation
No public evidence
Published
8 Sept 2026a month ago

Description

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the expression compiler sanitizer resolved through dynamically scoped this and did not reject reserved class member names. A class field named __sanitize could rebind the sanitizer and reach the Function constructor, enabling backend code execution and editor-preview JavaScript execution. The affected AST hook is PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

Details

Vendor
N8n-io
Product
n8n
Weakness
CWE-94 (opens in a new tab)
Status
Analyzed
Updated
11 Sept 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References 4

Advisories 1

Other references 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other N8n-io CVEs

Every N8n-io CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-86073 N8n-io n8n Incorrect Authorization Vulnerability EPSS 0.4% 7.6, high
  • CVE-2026-86074 N8n-io n8n Server-Side Request Forgery Vulnerability EPSS 0.4% 7.1, high
  • CVE-2026-86075 N8n-io n8n Allocation of Resources Without Limits or Throttling Vulnerability EPSS 0.6% 7.5, high
  • CVE-2026-86083 N8n-io n8n Code Injection Vulnerability EPSS 0.7% 8.8, high
  • CVE-2026-85165 N8n-io n8n Eval Injection Vulnerability EPSS 0.6% 9.9, critical
  • CVE-2026-85168 N8n-io n8n OS Command Injection Vulnerability EPSS 0.8% 8.8, high
  • CVE-2026-85169 N8n-io n8n Code Injection Vulnerability EPSS 0.9% 8.8, high

Beyond this page

Is CVE-2026-86076 in your network?

This page tells you how dangerous CVE-2026-86076 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-86076 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.