CVE-2026-21858

n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

• CWE-20

• https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pgVendor Advisory
• https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858Exploit, Third Party Advisory

Published

Jan 8, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• 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.

• CVE-2026-21852Claude Code is an agentic coding tool. Prior to version 2.0.…7.5
• CVE-2026-21853AFFiNE is an open-source, all-in-one workspace and an operat…8.8
• CVE-2026-21854The Tarkov Data Manager is a tool to manage the Tarkov item …9.8
• CVE-2026-21855The Tarkov Data Manager is a tool to manage the Tarkov item …6.1
• CVE-2026-21856The Tarkov Data Manager is a tool to manage the Tarkov item …8.8
• CVE-2026-21857REDAXO is a PHP-based content management system. Prior to ve…6.5
• CVE-2026-21859Mailpit is an email testing tool and API for developers. Ver…5.3
• CVE-2026-2186A vulnerability has been found in Tenda RX3 16.03.13.11. Imp…8.8
• CVE-2026-21860Werkzeug is a comprehensive WSGI web application library. Pr…5.3
• CVE-2026-21861baserCMS is a website development framework. Prior to versio…7.2
• CVE-2026-21862RustFS is a distributed object storage system built in Rust.…7.5
• CVE-2026-21863Valkey is a distributed key-value database. Prior to version…7.5