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CVE-2026-86076

8.8 · HIGH

n8n is an open source workflow automation platform.

Published Sep 8, 2026n8nCWE-94EPSS 0.79%

Overview

CVE-2026-86076 is a high-severity vulnerability affecting n8n n8n. It was published on September 8, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from n8n. Update n8n to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
n8nn8n>= 0, < 1.123.76Affected

References

GitHubgithub.com/n8n-io/n8n/releases/tag/[email protected]GitHubgithub.com/n8n-io/n8n/releases/tag/[email protected]GitHubgithub.com/n8n-io/n8n/releases/tag/[email protected]GitHubgithub.com/n8n-io/n8n/security/advisories/GHSA-hw8v-xxg5-vvvx

How CyberStrike helps

Frequently asked questions

What is CVE-2026-86076?

CVE-2026-86076 is a high-severity vulnerability affecting n8n n8n. It was published on September 8, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-86076?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-86076?

Check the references section for vendor advisories and patches from n8n. Update n8n to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-86076?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-86076 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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