Critical severityOSV Advisory· Published Jan 7, 2026· Updated Jan 12, 2026
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
CVE-2026-21858
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8nnpm | >= 1.65.0, < 1.121.0 | 1.121.0 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-v4pr-fm98-w9pgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-21858ghsaADVISORY
- github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pgghsax_refsource_CONFIRMWEB
- www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858ghsax_refsource_MISCWEB
News mentions
1- Risky Business #820 -- Asian fraud kingpin will face Chinese justice (pew pew!)Risky Business · Jan 14, 2026