Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck
CVE-2026-103248n8n before 1.123.80, 2.39.6, and 2.40.1 PostgREST Filter Injection via Supabase
Critical 9.0
In plain English
A critical-severity SQL injection in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).
Severity (CVSS 3.1)9.0Critical
Exploit odds (30 days)0.3%top 77.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
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