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Critical · 10.0 Scanner template Public exploit CVE-2026-21858 EUVD-2026-1187GHSA-v4pr-fm98-w9pg

n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling

Published Jan 7, 2026 · Updated Jan 12, 2026 · Assigned by GitHub_M

Vendor: n8n-io Product: n8n Package: n8n Ecosystem: npm

Description

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.

Affected products

VendorProductAffectedFixed
n8n-io n8n >= 1.65.0, < 1.121.0 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 16 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Affected packages

EcosystemPackageAffectedFixedRecord
npm n8n >= 1.65.0, < 1.121.0 1.121.0 GHSA-v4pr-fm98-w9pg

Advisories 2

References