CVE-2026-15043

DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted = SQL operators on text.<br /> <br /> DBI::SQL::Nano, DBI&amp;#39;s built-in mini-SQL engine, evaluated WHERE predicates incorrectly in some cases. In the non-numeric string branch of the is_matched method, = was evaluated using Perl&amp;#39;s le operator.<br /> <br /> SQL::Nano is the fallback query engine for DBI&amp;#39;s file-backed drivers (DBD::File, DBD::DBM, CSV-style drivers) whenever SQL::Statement is not installed, and is forced whenever DBI_SQL_NANO=1. Queries over such tables use these predicates directly.<br /> <br /> The impact depends on the context. Where an application relies on a WHERE clause to filter file-backed data for policy or authorization, an inverted = comparison silently returns the wrong rows.