by Kastro
Paper/Archive/CVE-2026-77071

CVE-2026-77071

n8n-io n8n — n8n before 1.123.69 PostgREST Filter Injection via Supabase

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 49.5.495 × 209.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

n8n before 1.123.69, 2.33.4, and 2.34.1 contains a PostgREST filter injection vulnerability in the Supabase node's Row Get Many, Delete, and Update operations, which built filter queries by concatenating an expression-bindable value without escaping. An attacker could inject a condition that widened the filter to match every row, turning an intended single-row operation into full-table disclosure, deletion, or modification.

Affected

ProductAffectedFixed inSource
n8n< 1.123.691.123.69CNA
n8n2.34.0 – < 2.34.12.34.1CNA
n8n2.0.0 – < 2.33.42.33.4CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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: partial

References

advisorygithub.com/n8n-io/n8n/security/advisories/GHSA-f4f3-2g67-4vhmwriteupvulncheck.com/advisories/n8n-before-postgrest-filter-injection-via-supabase