CVE-2026-15043: DBI::SQL::Nano versions from 1.42 before 1.651 for Perl have inverted <= and >= SQL operators on text. DBI::S

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CRITICAL 9.8REMOTE

CVE-2026-15043 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-480
Published	2026-07-14
Last modified	2026-10-24

Publisher (CNA): CPANSec

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-14 10:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora ELN · mingw-pcre2 · FIXED · 10.49-1.eln159 · FEDORA-2026-f41c1162af · source

sudo dnf upgrade --advisory=FEDORA-2026-f41c1162af

Fedora 46 · mingw-cfitsio · FIXED · 4.7.0-2.fc46 · FEDORA-2026-425e65a7c8 · source

sudo dnf upgrade --advisory=FEDORA-2026-425e65a7c8

Debian 12 · libdbi-perl · FIXED · 1.643-4+deb12u2

sudo apt update && sudo apt install --only-upgrade libdbi-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libdbi-perl)" ge "1.643-4+deb12u2" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · libdbi-perl · FIXED · 1.652-2~deb13u1

sudo apt update && sudo apt install --only-upgrade libdbi-perl dpkg --compare-versions "$(dpkg-query -W -f='${Version}' libdbi-perl)" ge "1.652-2~deb13u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · perl-DBI · DEFERRED

RHEL 6 · perl-DBI · DEFERRED

RHEL 7 · perl-DBI · DEFERRED

RHEL 8 · perl-DBI · DEFERRED

RHEL 8 · perl-DBI:1.641/perl-DBI · DEFERRED

Alpine 3.24 · perl-dbi · FIXED · perl-dbi-1.651-r0

apk add --upgrade perl-dbi apk info -v perl-dbi

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-2006 · source

sudo dnf update --advisory=ALAS2023-2026-2006

Amazon Linux 2 · see advisory · FIXED · ALAS2-2026-3851 · source

sudo yum update --advisory=ALAS2-2026-3851

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: metacpan.org/release/HMBRAND/DBI-1.651/changes

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-15043?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-15043 being exploited?

CVE-2026-15043 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-15043 affect?

CVE-2026-15043 affects affected software. Severity is critical (CVSS 9.8). 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 o

How urgent is CVE-2026-15043?

Priority 50/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

References

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