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CVE-2026-49859

Estado: AnalizadaMedia (5.2)—

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, when fetch() was called, Deno checked the destination hostname against --deny-net rules but did not re-check the IP addresses that hostname resolved to. An attacker-controlled script could use a specially crafted domain name that passes the hostname check yet resolves to a denied IP, bypassing the network restriction entirely. This vulnerability is fixed in 2.8.1.

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)

Deno — Deno

CWE

Referencias

JSON original (NVD)

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          "version": "2.0.3",
          "timestamp": "2026-06-24T14:22:56.623204Z"
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
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          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
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        "exploitabilityScore": 2
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      "affectedData": [
        {
          "vendor": "denoland",
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            }
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  "published": "2026-06-23T18:18:03.927",
  "references": [
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      "url": "https://github.com/denoland/deno/security/advisories/GHSA-cpgj-f7g3-2pp2",
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    }
  ],
  "lastModified": "2026-06-29T14:38:17.253",
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