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CVE-2025-55195

Estado: AplazadaAlta (7.3)—

@std/toml is the Deno Standard Library. Prior to version 1.0.9, an attacker can pollute the prototype chain in Node.js runtime and Browser when parsing untrusted TOML data, thus achieving Prototype Pollution (PP) vulnerability. This is because the library is merging an untrusted object with an empty object, which by default the empty object has the prototype chain. This issue has been patched in version 1.0.9.

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.

AV:N/PR:N/UI:N permite explotación remota sin privilegios (T1190). Prototype pollution en TOML permite manipular propiedades globales y credenciales (T1078) o alterar datos (T1565).

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 ManagementNetwork SegmentationApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

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

Deno — STD TomlAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-55195",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-55195",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-08-14T18:36:13.234384Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "denoland",
          "product": "std",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.0.9"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-08-14T17:15:41.330",
  "references": [
    {
      "url": "https://github.com/denoland/std/commit/540662cfd6d71e969af292aa604ef4049dbe271b",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/denoland/std/releases/tag/release-2025.08.13",
      "source": "security-advisories@github.com"
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      "url": "https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r",
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    {
      "url": "https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "@std/toml is the Deno Standard Library. Prior to version 1.0.9, an attacker can pollute the prototype chain in Node.js runtime and Browser when parsing untrusted TOML data, thus achieving Prototype Pollution (PP) vulnerability. This is because the library is merging an untrusted object with an empty object, which by default the empty object has the prototype chain. This issue has been patched in version 1.0.9."
    },
    {
      "lang": "es",
      "value": "@std/toml es la librería estándar de Deno. Antes de la versión 1.0.9, un atacante podía contaminar la cadena de prototipos en el entorno de ejecución y el navegador de Node.js al analizar datos TOML no confiables, lo que provocaba una vulnerabilidad de contaminación de prototipos (PP). Esto se debe a que la librería fusiona un objeto no confiable con un objeto vacío, que por defecto contiene la cadena de prototipos. Este problema se ha corregido en la versión 1.0.9."
    }
  ],
  "lastModified": "2026-06-17T09:41:26.177",
  "sourceIdentifier": "security-advisories@github.com"
}