CVE-2026-86076
Last modified
CVE-2026-86076 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| N8n | N8n | < 1.123.76 |
| N8n | N8n | >= 2.0.0, < 2.37.7 |
| N8n | N8n | >= 2.38.0, < 2.38.2 |
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hw8v-xxg5-vvvxMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-86076?
How severe is CVE-2026-86076?
How do I fix CVE-2026-86076?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-86066Horilla is an HR and CRM software. Prior to 2.0.0, approve_v…5.9
- CVE-2026-8607The Points Management System For Gamification, Ranks, Badges…6.4
- CVE-2026-86071Junrar is an open source Java RAR archive library. Prior to …3.7
- CVE-2026-86073n8n is an open source workflow automation platform. Prior to…7.6
- CVE-2026-86074n8n is an open source workflow automation platform. Prior to…7.1
- CVE-2026-86075n8n is an open source workflow automation platform. Prior to…7.5
- CVE-2026-86077n8n is an open source workflow automation platform. Prior to…6.5
- CVE-2026-86078n8n is an open source workflow automation platform. Prior to…6.5
- CVE-2026-86079n8n is an open source workflow automation platform. Prior to…6.5
- CVE-2026-8608The Event Monster – Event Management, Events Calendar, Ticke…5.3
- CVE-2026-86080n8n is an open source workflow automation platform. Prior to…5.3
- CVE-2026-86081n8n is an open source workflow automation platform. Prior to…7.1
Are you affected by CVE-2026-86076?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST