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CVE-2026-107373

Status: ReceivedUnscored—

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

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.

Technical details traces, logs and code from the original report
    $var = std::string( SvPV_nolen($arg), SvCUR($arg) )

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

FIRST hasn't scored this CVE yet (usual for very recent or rejected CVEs).

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Extutils Typemaps STL String Project — Extutils Typemaps STL StringAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-107373",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/tsee/extutils-typemap-default",
          "modules": [
            "ExtUtils::Typemaps::STL::String"
          ],
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.06",
              "versionType": "custom"
            }
          ],
          "packageURL": "pkg:cpan/ExtUtils-Typemaps-Default",
          "packageName": "ExtUtils-Typemaps-Default",
          "programFiles": [
            "lib/ExtUtils/Typemaps/STL/String.pm"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-10T13:17:31.253",
  "references": [
    {
      "url": "https://github.com/tsee/extutils-typemap-default/commit/a6b9c298b34ddadc582961403e715d292f82a22d",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/SMUELLER/ExtUtils-Typemaps-Default-1.06/changes",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://rt.cpan.org/Public/Bug/Display.html?id=94110",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80490",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "ExtUtils::Typemaps::STL::String versions before 1.06 for Perl T_STD_STRING typemap may read the SV length before stringifying the argument.\n\nThe typemap uses\n\n    $var = std::string( SvPV_nolen($arg), SvCUR($arg) )\n\nHowever, evaluation order for C++ arguments is not specified, and some compilers may produce code that evalutes SvCUR($arg) first.\n\nWhen $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."
    }
  ],
  "lastModified": "2026-10-10T13:17:31.253",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}