CVE-2026-103255
CRITICAL
CVSS 9.0
Published: 2026-10-01
Modified: 2026-10-01
Tenable Plugin
Checking the public Tenable catalog…
Threat Intelligence Pending
IOCs, MITRE ATT&CK techniques, and attack chain data are being generated. Refresh in a few seconds.
Description
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in the Supabase node where the tableId parameter is inserted into request paths without validation. Attackers can exploit workflows binding tableId to untrusted input to traverse to Auth and Storage APIs using the administrative serviceRole key, bypassing Row Level Security and enabling unauthorized data access and modification.
Quick Facts
| CVE ID | CVE-2026-103255 |
| CVSS Score | 9.0 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| Published | 2026-10-01 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |