{"schemaVersion":3,"id":"CVE-2026-15043","aliases":["ALPINE-CVE-2026-15043","UBUNTU-CVE-2026-15043","DEBIAN-CVE-2026-15043"],"status":"published","duplicateOf":null,"title":"DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text","description":"DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text.\n\nDBI::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.\n\nSQL::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.\n\nThe 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.","dates":{"published":"2026-07-14T09:44:25.733Z","modified":"2026-07-14T15:32:33.329Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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of Incorrect Operator","description":"The product accidentally uses the wrong operator, which changes the logic in security-relevant ways.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Low","url":"https://cwe.mitre.org/data/definitions/480.html"}],"affected":[{"vendor":"alpine","product":"perl-dbi","name":"perl-dbi","label":"perl-dbi","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/perl-dbi","purlType":"apk","versions":[{"text":"< 1.651-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.651-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"libdbi-perl","name":"libdbi-perl","label":"libdbi-perl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libdbi-perl","purlType":"deb","versions":[{"text":"< 1.643-4+deb12u2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.652-2~deb13u1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.651-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 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