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CVE-2026-80490

Estado: AplazadaSin puntuar—

Algorithm::AhoCorasick::XS versions through 0.04 for Perl read the haystack string length before the scalar is stringified.

The matches, first_match and match_details methods use the T_STD_STRING typemap to translate Perl scalars (SVs) into strings via the std::string constructor, using the SvPV macro to stringify the haystack input, and the SvCUR macro to determine the length of the SV.

When the input SVs are references, integers (IVs) or floats (NVs), the SvCUR macro will return an invalid length if it is run before the input is stringified, leading to an out-of-bounds read which can abort the process.

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Note that the evaluation order of arguments to std::string is unspecified. Depending on the compiler, SvCUR may be run first and lead to an abort that cannot be caught within Perl.

This can be triggered when the haystack is a numeric value, for example,

This can occur when the haystack is the result of reading data from decoded JSON or a numeric database column. It can also be triggered when using a blessed object as a haystack.

Detalles técnicos trazas, registros y código del informe original
    my $ac = Algorithm::AhoCorasick::XS->new( [ "11", "22" ] );
    $ac->matches( 211 );

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Algorithm Ahocorasick XS — Algorithm Ahocorasick XSAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-80490",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/richardjharris/Algorithm-AhoCorasick-XS",
          "modules": [
            "Algorithm::AhoCorasick::XS"
          ],
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "0.04"
            }
          ],
          "packageURL": "pkg:cpan/Algorithm-AhoCorasick-XS",
          "packageName": "Algorithm-AhoCorasick-XS",
          "programFiles": [
            "typemap"
          ],
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "Algorithm::AhoCorasick::XS::first_match"
            },
            {
              "name": "Algorithm::AhoCorasick::XS::matches"
            },
            {
              "name": "Algorithm::AhoCorasick::XS::match_details"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-30T16:19:10.127",
  "references": [
    {
      "url": "https://github.com/richardjharris/Algorithm-AhoCorasick-XS/pull/1",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://metacpan.org/release/RJH/Algorithm-AhoCorasick-XS-0.04/source/typemap#L14",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://rt.cpan.org/Ticket/Display.html?id=181560",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://security.metacpan.org/patches/A/Algorithm-AhoCorasick-XS/0.04/CVE-2026-80490-r1.patch",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/09/30/15",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Algorithm::AhoCorasick::XS versions through 0.04 for Perl read the haystack string length before the scalar is stringified.\n\nThe matches, first_match and match_details methods use the T_STD_STRING typemap to translate Perl scalars (SVs) into strings via the std::string constructor, using the SvPV macro to stringify the haystack input, and the SvCUR macro to determine the length of the SV.\n\nWhen the input SVs are references, integers (IVs) or floats (NVs), the SvCUR macro will return an invalid length if it is run before the input is stringified, leading to an out-of-bounds read which can abort the process.\n\nNote that the evaluation order of arguments to std::string is unspecified. Depending on the compiler, SvCUR may be run first and lead to an abort that cannot be caught within Perl.\n\nThis can be triggered when the haystack is a numeric value, for example,\n\n    my $ac = Algorithm::AhoCorasick::XS->new( [ \"11\", \"22\" ] );\n    $ac->matches( 211 );\n\nThis can occur when the haystack is the result of reading data from decoded JSON or a numeric database column. It can also be triggered when using a blessed object as a haystack."
    }
  ],
  "lastModified": "2026-09-30T19:57:08.043",
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}