PT-2026-58001 · Hmbrand · Dbi::Sql::Nano

Published 2026-07-14 · Updated 2026-07-14 · CVE-2026-15043

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text.

DBI::SQL::Nano, DBI'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's ge operator, and >= was evaluated using Perl's le operator.

SQL::Nano is the fallback query engine for DBI'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.

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.

Fix

Weakness Enumeration

CWE-480

Related Identifiers

CVE-2026-15043

Affected Products

Dbi::Sql::Nano

References · 4

• https://github.com/perl5-dbi/dbi/security/advisories/GHSA-mv45-ff6j-x9jp · Vendor Advisory
• https://github.com/perl5-dbi/dbi/commit/e9742ef85a75867cbd696860e3bf3e32b681f98d.patch · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-15043 · Security Note
• http://openwall.com/lists/oss-security/2026/07/14/9 · Note