What is CVE-2026-103248?

CVE-2026-103248 is a critical-severity vulnerability in N8n-Io N8n, classified under SQL Injection. CVSS score: 9.0/10. Published 2026-10-01.

How severe is CVE-2026-103248?

Critical severity. CVSS v3 base score is 9.0 out of 10.

SQL Injection in N8n-Io N8n

CVE-2026-103248

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.

Vulnerability class: SQL Injection

Published 2026-10-01 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

N8n-Io N8n

Weakness classification (CWE)

CWE-89 — SQL Injection

References

GitHub Security Advisory (GHSA-xrqg-3xcp-h45x) (vendor-advisory)
VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 PostgREST Filter Injection via Supabase (third-party-advisory)

Frequently asked questions

What is CVE-2026-103248?: CVE-2026-103248 is a critical-severity vulnerability in N8n-Io N8n, classified under SQL Injection. CVSS score: 9.0/10. Published 2026-10-01.
How severe is CVE-2026-103248?: Critical severity. CVSS v3 base score is 9.0 out of 10.