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

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Summary

CVECVE-2026-15043
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 10:16:31 UTC
Updated2026-07-14 16:44:28 UTC
DescriptionDBI::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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001840000 probability, percentile 0.081470000 (date 2026-07-14)

Problem Types: CWE-480 | CWE-480 CWE-480 Use of Incorrect Operator

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA HMBRAND DBISQLNano affected 1.42 1.651 custom Not specified

References

ReferenceSourceLinkTags
github.com/perl5-dbi/dbi/commit/e9742ef85a75867cbd696860e3bf3e32b681f98d... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
www.openwall.com/lists/oss-security/2026/07/14/9 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
github.com/perl5-dbi/dbi/security/advisories/GHSA-mv45-ff6j-x9jp 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
metacpan.org/release/HMBRAND/DBI-1.651/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2004-03-12T00:00:00.000ZVersion 1.42 released with DBI::SQL::Nano.
CNA2026-07-10T00:00:00.000ZPatch that fixes DBI::SQL::Nano merged.
CNA2026-07-14T00:00:00.000ZVersion 1.651 released.

Solutions

CNA: Upgrade to DBI 1.651 or later.

Workarounds

CNA: For deployments that cannot upgrade, apply the patch or install SQL::Statement.

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