What’s Vulnerable › Vulnerabilities

CVE-2026-88815: DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in sql_type_cast_svpv

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-28 · updated 2026-09-30
• Weakness: CWE-843

Description

DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in sql_type_cast_svpv. When casting to SQL_NUMERIC, sql_type_cast_svpv passes the string pointer and length of the SV to grok_number without stringifying it first. An integer (IV) or floating-point (NV) value has no valid string pointer, so grok_number reads from an invalid address, triggering a segmentation fault. This is reachable in Perl using the sql_type_cast function: my $num = 42; DBI::sql_type_cast( $num, DBI::SQL_NUMERIC, 0 );

Affected products

• DBI: before 1.654 — fixed in 1.654

How to fix

Upgrade to a fixed version: DBI 1.654. Check the vendor advisory for mitigations.

References

• https://github.com/perl5-dbi/dbi/commit/e5ad87e5602da995d28b4d65df222368b58d6702.patch
• https://github.com/perl5-dbi/dbi/security/advisories/GHSA-c8vq-w3wr-6979
• https://metacpan.org/release/HMBRAND/DBI-1.654/changes
• http://www.openwall.com/lists/oss-security/2026/09/28/12
• https://github.com/perl5-dbi/dbi/security/advisories/GHSA-c8vq-w3wr-6979

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