by Kastro
Paper/Archive/CVE-2026-103248

CVE-2026-103248

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

EPSS 0.3%CVSS 9.0
critical.is priorityof 100
32
CVSS 9.0 (CNA)9.0 / 10 × 3027.0Not in CISA KEV+300.0EPSS percentile 22.8.228 × 204.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
n8n< 1.123.801.123.80CNA
n8n2.0.0 – < 2.39.62.39.6CNA
n8n2.40.0 – < 2.40.12.40.1CNA

Scores by source

VulnCheck (CNA)9.0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)7.1CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/n8n-io/n8n/security/advisories/GHSA-xrqg-3xcp-h45xwriteupvulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-postgrest-filter-injection-via-supabase