| Component | n8n |
| Severity | high (CVSS 8.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-08-20 |
| Last modified | 2026-09-01 |
| Affected versions | n8n < 1.123.69 n8n >= 2.0.0, < 2.33.4 n8n = 2.34.0 |
| Fixed in | 1.123.69, 2.33.4 |
| Weakness | CWE-78 |
| CISA KEV | not listed |
NVD description
n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contain an arbitrary file read and write vulnerability in the Snowflake node, which passes free-form Execute Query input, including client-side commands, directly to the Snowflake SDK without applying n8n's file-access restrictions. An authenticated user with usable Snowflake credentials can upload a local file from the n8n host or overwrite an existing file with a staged one.
What to do
- Upgrade n8n to
1.123.69or later (or the patched release of your branch: 2.33.4). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-77080
- https://github.com/n8n-io/n8n/security/advisories/GHSA-r4j2-j3wm-q689
- https://www.vulncheck.com/advisories/n8n-before-arbitrary-file-read-and-write-via-snowflake
Read more
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