Vulnerability in Hmbrand Dbi::sql::nano
CVE-2026-15043
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Hmbrand Dbi::sql::nano — versions 1.42
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (vendor-advisory)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
- af854a3a-2127-422b-91ae-364da2661108
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
Frequently asked questions
- What is CVE-2026-15043?
- CVE-2026-15043 is a critical-severity vulnerability in Hmbrand Dbi::sql::nano, classified under CWE-480. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-15043?
- Critical severity. CVSS v3 base score is 9.8 out of 10.