Improper Access Control

n8n is vulnerable to Improper Access Control. The vulnerability is due to insecure handling of form-based workflows, which allows an unauthenticated attacker to access files on the underlying server and expose sensitive system information...

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,...

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,...

CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling

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,...

CVE-2026-21858

CVE-2026-21858 (n8n) affects n8n versions starting from 1.65.0 up to and including 1.120.x. The root cause is an inadequate input validation in form-based workflow processing, leading to Content-Type confusion that enables an unauthenticated attacker to read arbitrary server files and potentially...

PT-2026-1662

Name of the Vulnerable Software and Affected Versions n8n versions 1.65.0 through 1.120.x Description A content-type confusion issue exists in the way the platform processes form-based webhook requests. When a request is sent, the system determines the parser based on the Content-Type header;...