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CVE-2026-4176

Estado: AnalizadaCrítica (9.8)—

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib.

Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Perl expuesto a red sin privilegios (AV:N/PR:N/UI:N) permite explotación remota. Vulnerabilidad en zlib bundled permite ejecución de código arbitrario y denegación de servicio.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementFilter Network TrafficVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software Installation

Tecnologías afectadas (1)

Perl — Perl

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-4176",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-4176",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-30T15:34:29.395269Z"
        }
      }
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          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
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  "affected": [
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      "affectedData": [
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          "vendor": "SHAY",
          "product": "perl",
          "versions": [
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              "version": "5.9.4",
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              "versionType": "custom"
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          "packageName": "perl",
          "collectionURL": "https://cpan.org/modules",
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  "published": "2026-03-29T21:16:15.717",
  "references": [
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      "url": "https://github.com/Perl/perl5/commit/c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94",
      "tags": [
        "Patch"
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      "tags": [
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      ],
      "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/03/30/2",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib.\n\nCompress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94."
    },
    {
      "lang": "es",
      "value": "Las versiones de Perl desde la 5.9.4 anteriores a la 5.40.4-RC1, desde la 5.41.0 anteriores a la 5.42.2-RC1, y desde la 5.43.0 anteriores a la 5.43.9 contienen una versión vulnerable de Compress::Raw::Zlib.\n\nCompress::Raw::Zlib está incluido en el paquete de Perl como un módulo central de doble vida, y es vulnerable a CVE-2026-3381 debido a una versión empaquetada de zlib que tiene varias vulnerabilidades, incluyendo CVE-2026-27171. El Compress::Raw::Zlib empaquetado fue actualizado a la versión 2.221 en el commit de Perl blead c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94."
    }
  ],
  "lastModified": "2026-06-17T10:56:07.190",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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}