- Critical 10.0
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.
Scores
The facts
- Published
- 8 January 2026
- Last changed
- 17 June 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 10.0 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- Affects
- n8n n8n
- Known exploited
- Not in the CISA Known Exploited Vulnerabilities catalogue in this build.
- EPSS
- 78.2% chance of exploitation activity in the next 30 days (percentile 100).
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