SQL Injection · passage 9 of 186

Error Based Injection

2 code blocks · SQL Injection/README.md

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Error-Based SQL Injection is a technique that relies on the error messages returned from the database to gather information about the database structure. By manipulating the input parameters of an SQL query, an attacker can make the database generate error messages. These errors can reveal critical details about the database, such as table names, column names, and data types, which can be used to craft further attacks. For example, on a PostgreSQL, injecting this payload in a SQL query would result in an error since the LIMIT clause is expecting a numeric value.

LIMIT CAST((SELECT version()) as numeric)

The error will leak the output of the `version()`.

ERROR: invalid input syntax for type numeric: "PostgreSQL 9.5.25 on x86_64-pc-linux-gnu"

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Data as of 2026-11-14. CVE List through 2026-11-14 · EPSS of 2026-11-13 · CISA KEV checked 2026-11-14. Source: PayloadsAllTheThings by Swissky and contributors, MIT License. For authorised testing only.