Unknown severity · Source severity not reportedCVE-2026-107373

ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argumentCVE-2026-107373

Answer in brief

CVE-2026-107373 records a Unknown severity vulnerability in ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument. The current sources do not mark it as known exploited. The current feed maps ExtUtils-Typemaps-Default (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 10, 2026Updated Oct 10, 2026Source checked Oct 10, 2026First seen by HOL Oct 10, 2026Material review Oct 10, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ExtUtils-Typemaps-Default (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ExtUtils-Typemaps-Defaultgeneric	>=0 <1.06	1.06

Recommended response

Check inventory. Check lockfiles and deployed manifests for ExtUtils-Typemaps-Default.
Review the reported fix. Source-reported solution: Upgrade to ExtUtils::Typemaps::Default version 1.06 or later. Rebuild any modules that use ExtUtils::Typemaps::Default as part of their build process.

Evidence timeline and material changes

Published upstream
Oct 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 10, 2026

Sources and claim methodology

Upstream source description

ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument. The typemap uses $var = std::string( SvPV_nolen($arg), SvCUR($arg) ) However, evaluation order for C++ arguments is not specified, and some compilers may produce code that evalutes SvCUR($arg) first. When $arg is not a string (for example, an interger, number or a reference) then SvCUR will return an invalid value, and the program may abort or segfault.

Quoted source text, attributed separately from HOL analysis.