CVE-2026-88816 (GCVE-0-2026-88816)

Vulnerability from cvelistv5 – Published: 2026-09-28 16:04 – Updated: 2026-09-28 18:10
VLAI
Title
DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName
Summary
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;
Severity
No CVSS data available.
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
Impacted products
Vendor Product Version CPE status
Affected: 0 , < 1.654 (custom)
Credits
Harsh Raj Singhania
Show details on NVD website
To clipboard 

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          "value": "DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName.\n\nfetchrow_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.\n\nThis can be triggered with the following code:\n\n   my $dbh = DBI-\u003econnect( \"dbi:ExampleP:\", \"\", \"\",\n       { RaiseError =\u003e 0, PrintError =\u003e 0 } );\n   $dbh-\u003e{FetchHashKeyName} = 42;\n\n   my $sth = $dbh-\u003eprepare(\"select mode, size, name from .\");\n   $sth-\u003eexecute;\n   $sth-\u003efetchrow_hashref;"
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          "url": "https://github.com/perl5-dbi/dbi/security/advisories/GHSA-f4qx-mr9m-q2hq"
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          "url": "https://metacpan.org/release/HMBRAND/DBI-1.654/changes"
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          "value": "Upgrade to DBI 1.654 or later."
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    "dateReserved": "2026-09-10T08:47:49.901Z",
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      "title": "perl-DBI: perl-DBI: Denial of Service via numeric FetchHashKeyName attribute",
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