CVE-2026-107373CWE-125

CVE-2026-107373

Critical · published October 10, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00402 · 33.3th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-10-10T17:17Z
References (4)
https://github.com/tsee/extutils-typemap-default/commit/a6b9c298b34ddadc582961403e715d292f82a22d · 9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://metacpan.org/release/SMUELLER/ExtUtils-Typemaps-Default-1.06/changes · 9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://rt.cpan.org/Public/Bug/Display.html?id=94110 · 9b29abf9-4ab0-4765-b253-1875cd9b441ehttps://www.cve.org/CVERecord?id=CVE-2026-80490 · 9b29abf9-4ab0-4765-b253-1875cd9b441e
EPSS history
Timeline
  • 12 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 10 OCT 12:44Z
    ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument
    cvelistv5
  • 10 OCT 12:44Z
    ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument
    cvelistv5