Threat Intelligence / CVE / CVE-2026-21858
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.
CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Weaknesses (CWE)
CWE-20
Threats tracking this CVE
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg
- https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858
Full detection coverage & IOCs for threats exploiting CVE-2026-21858 are available via the Threadlinqs MCP server (Purple tier). View plans →