CVE-2026-103248

n8n before 1.123.80, 2.39.6, and 2.40.1 PostgREST Filter Injection via Supabase

State: Published
Severity: 7.1 High
Published: Oct 1, 2026
Updated: Oct 1, 2026
Reserved: Sep 30, 2026

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 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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H	VulnCheck
3.1	9.0 Critical	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Affected Products

Product	Versions
n8nn8n-io	before 1.123.80Affected 2.0.0 to before 2.39.6Affected 2.40.0 to before 2.40.1Affected

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 Supabasethird-party-advisory

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