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CVE-2026-49940

Estado: AnalizadaMedia (6.5)—

Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.

Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.

CVSS

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)

Rrwo — Net\

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-49940",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-49940",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-04T17:33:44.242109Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "affectedData": [
        {
          "repo": "https://github.com/robrwo/perl-Net-CIDR-Set",
          "vendor": "RRWO",
          "product": "Net::CIDR::Set",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "0.20"
            }
          ],
          "packageName": "Net-CIDR-Set",
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "Net::CIDR::Set::IPv4::_pack"
            },
            {
              "name": "Net::CIDR::Set::IPv4::_encode"
            },
            {
              "name": "Net::CIDR::Set::IPv6::_pack"
            },
            {
              "name": "Net::CIDR::Set::IPv6::_pack_ipv4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-04T17:16:33.053",
  "references": [
    {
      "url": "https://metacpan.org/release/RRWO/Net-CIDR-Set-0.21/changes",
      "tags": [
        "Release Notes"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40911",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1289"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks.\n\nUnicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers.  This could allow network masks to accept larger networks."
    },
    {
      "lang": "es",
      "value": "Las versiones de Net::CIDR::Set hasta la 0.20 para Perl aceptan direcciones IP y máscaras de red no ASCII.\n\nDígitos Unicode como el Uno arábigo-índico (U+0661) eran aceptados pero no se analizaban correctamente como números. Esto podría permitir que las máscaras de red aceptaran redes más grandes."
    }
  ],
  "lastModified": "2026-07-22T20:10:00.127",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rrwo:net\\:\\:cidr\\:\\:set:*:*:*:*:*:perl:*:*",
              "vulnerable": true,
              "matchCriteriaId": "24C7BD24-8729-408F-BD1D-F8F0608DFE50",
              "versionEndExcluding": "0.21"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}