Description
DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName.

fetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault.

This can be triggered with the following code:

my $dbh = DBI->connect( "dbi:ExampleP:", "", "",
{ RaiseError => 0, PrintError => 0 } );
$dbh->{FetchHashKeyName} = 42;

my $sth = $dbh->prepare("select mode, size, name from .");
$sth->execute;
$sth->fetchrow_hashref;
Published: 2026-09-28
Score: n/a
EPSS: n/a
KEV: No
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Remediation

Vendor Solution

Upgrade to DBI 1.654 or later.

Tracking

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History

Mon, 28 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Perl
Perl dbi
Vendors & Products Perl
Perl dbi

Mon, 28 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Description DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName. fetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault. This can be triggered with the following code: my $dbh = DBI->connect( "dbi:ExampleP:", "", "", { RaiseError => 0, PrintError => 0 } ); $dbh->{FetchHashKeyName} = 42; my $sth = $dbh->prepare("select mode, size, name from ."); $sth->execute; $sth->fetchrow_hashref;
Title DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName
Weaknesses CWE-843
References

cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-09-28T18:10:35.512Z

Reserved: 2026-09-10T08:47:49.901Z

Link: CVE-2026-88816

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-28T17:17:52.203

Modified: 2026-09-28T17:17:52.203

Link: CVE-2026-88816

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-28T18:15:04Z

Weaknesses
  • CWE-843

    Access of Resource Using Incompatible Type ('Type Confusion')