CVE-2026-15043
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. 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.
INFO
Published Date :
July 14, 2026, 10:16 a.m.
Last Modified :
Oct. 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update DBI::SQL::Nano to version 1.651 or later.
- Verify SQL query predicate logic for text comparisons.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15043.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15043 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15043
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15043 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-15043 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: DBI::SQL::Nano de HMBRAND, Description: Las versiones de DBI::SQL::Nano desde la 1.42 anteriores a la 1.651 para Perl tienen invertidos los operadores SQL <= y >= en texto. DBI::SQL::Nano, el motor mini-SQL integrado de DBI, evaluó predicados WHERE incorrectamente en algunos casos. En la rama de cadena no numérica del método is_matched, <= se evaluó usando el operador ge de Perl, y >= se evaluó usando el operador le de Perl. SQL::Nano es el motor de consulta de respaldo para los controladores de DBI respaldados por archivos (DBD::File, DBD::DBM, controladores de estilo CSV) siempre que SQL::Statement no esté instalado, y se fuerza siempre que DBI_SQL_NANO=1. Las consultas sobre dichas tablas usan estos predicados directamente. El impacto depende del contexto. Donde una aplicación depende de una cláusula WHERE para filtrar datos respaldados por archivos para políticas o autorización, una comparación <=/>= invertida devuelve silenciosamente las filas incorrectas. -
CVE Modified by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jul. 14, 2026
Action Type Old Value New Value Added Reference https://metacpan.org/release/HMBRAND/DBI-1.651/changes -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added SSVC {'id': 'CVE-2026-15043', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-14T14:14:59.552000Z'} -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 14, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/07/14/9 -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
Jul. 14, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/perl5-dbi/dbi', 'vendor': 'HMBRAND', 'product': 'DBI::SQL::Nano', 'versions': [{'status': 'affected', 'version': '1.42', 'lessThan': '1.651', 'versionType': 'custom'}], 'packageName': 'DBI', 'programFiles': ['lib/DBI/SQL/Nano.pm'], 'collectionURL': 'https://cpan.org/modules', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': 'DBI::SQL::Nano::is_matched'}]}] Added Description 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. Added CWE CWE-480 Added Reference https://github.com/perl5-dbi/dbi/commit/e9742ef85a75867cbd696860e3bf3e32b681f98d.patch Added Reference https://github.com/perl5-dbi/dbi/security/advisories/GHSA-mv45-ff6j-x9jp