CVE-2026-103248: n8n-Io n8n

Critical severity, CVSS 9.0. EPSS: 0.3% chance of exploitation in the next 30 days.

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 filter injection vulnerability in the Supabase node's Filters (String) mode that fails to escape field values. Attackers can inject filter expressions from untrusted input to read all table rows, update all records, or delete entire tables in a single request.

Affected products

• n8n-Io n8n: before 1.123.80 (fixed in 1.123.80); from 2.0.0, before 2.39.6 (fixed in 2.39.6); from 2.40.0, before 2.40.1 (fixed in 2.40.1)

Published 2026-10-01. Last modified 2026-10-01.