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CVE-2026-101894

Estado: En análisisCrítica (9.1)—

The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution.

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The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4.

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.

Vulnerabilidad en API de descompresión explotable remotamente sin autenticación (AV:N, PR:N, UI:N). Cadena de symlinks permite leer/escribir fuera del directorio destino; sobrescribir scripts de inicio causa RCE.

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

Vulnerability ScanningRestrict Web-Based ContentRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageNetwork Segmentation

Tecnologías afectadas (1)

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

Xhmikosr — DecompressAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-101894",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-101894",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-28T17:38:56.943847Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "XhmikosR",
          "product": "decompress",
          "versions": [
            {
              "status": "affected",
              "version": "< 10.2.2"
            },
            {
              "status": "affected",
              "version": ">= 11.0.0, < 11.1.4"
            }
          ]
        },
        {
          "vendor": "kevva",
          "product": "decompress",
          "versions": [
            {
              "status": "affected",
              "version": "<= 4.2.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-09-28T17:17:48.830",
  "references": [
    {
      "url": "https://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/XhmikosR/decompress/releases/tag/v10.2.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/XhmikosR/decompress/releases/tag/v11.1.4",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-59"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4."
    }
  ],
  "lastModified": "2026-09-30T19:38:27.293",
  "sourceIdentifier": "security-advisories@github.com"
}