https://bugzilla.redhat.com/show_bug.cgi?id=2501292
Bug ID: 2501292
Summary: CVE-2026-15043 perl-DBI: DBI::SQL::Nano: Incorrect SQL
operator evaluation can lead to incorrect data
filtering. [fedora-all]
Product: Fedora
Version: rawhide
Status: NEW
Whiteboard: {"flaws": ["706ae694-0b64-4769-b535-7d07cd177639"]}
Component: perl-DBI
Keywords: Security, SecurityTracking
Severity: medium
Priority: medium
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected], [email protected],
[email protected],
[email protected], [email protected]
Blocks: 2499934 (CVE-2026-15043)
Target Milestone: ---
Classification: Fedora
Disclaimer: Community trackers are created by Red Hat Product Security team on
a best effort basis. Package maintainers are required to ascertain if the flaw
indeed affects their package, before starting the update process.
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.
Referenced Bugs:
https://bugzilla.redhat.com/show_bug.cgi?id=2499934
[Bug 2499934] CVE-2026-15043 DBI::SQL::Nano: DBI::SQL::Nano: Incorrect SQL
operator evaluation can lead to incorrect data filtering.
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