CVE-2026-77071
Received Received - Intake

PostgREST Filter Injection in n8n Supabase Node

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-08-20
Last Modified
2026-08-20
Generated
2026-08-20
AI Q&A
2026-08-20
EPSS Evaluated
N/A
NVD
CVE-2026-77071
EUVD
EUVD-2026-63260

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
n8n n8n to 1.123.69 (exc)
n8n n8n to 2.33.4 (exc)
n8n n8n to 2.34.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

Attack-Flow Graph

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Executive Summary

This vulnerability is a PostgREST filter injection flaw in n8n versions before 1.123.69, 2.33.4, and 2.34.1. It affects the Supabase node's Row Get Many, Delete, and Update operations. The issue occurs because the software concatenates expression-bindable values without escaping when building filter queries. Attackers can inject conditions to broaden the filter, turning a single-row operation into a full-table disclosure, deletion, or modification.

Detection Guidance

Check n8n version with 'n8n --version' or inspect package.json. Look for Supabase node usage in workflows. Monitor database logs for unexpected full-table operations or unusual filter patterns.

Impact Analysis

An attacker could exploit this to access, delete, or modify all rows in a database table instead of just the intended single row. This could lead to unauthorized data exposure, loss of critical information, or system compromise. The vulnerability can be exploited remotely with low complexity and no privileges required.

Compliance Impact

This vulnerability could lead to unauthorized data access or deletion, violating GDPR's data protection principles and HIPAA's security rules. Non-compliance may result in legal penalties, fines, or reputational damage due to exposed sensitive data.

Mitigation Strategies

Upgrade n8n to versions 1.123.69, 2.33.4, or 2.34.1 or later. Temporarily restrict Supabase node access to trusted users, audit workflows for untrusted input, or disable the Supabase node until patched.

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