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CVE-2026-39410

Estado: AnalizadaMedia (4.8)—

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a discrepancy between browser cookie parsing and parse() handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse(), allowing attacker-controlled cookies to override legitimate ones. This vulnerability is fixed in 4.12.12.

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)

Hono — Hono

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-39410",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-39410",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-08T15:17:07.686689Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 2.2
      }
    ]
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      "affectedData": [
        {
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            }
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  "published": "2026-04-08T15:16:15.143",
  "references": [
    {
      "url": "https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0",
      "tags": [
        "Third Party Advisory"
      ],
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      "url": "https://github.com/honojs/hono/releases/tag/v4.12.12",
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        "Release Notes"
      ],
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    },
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      "description": [
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    {
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      "description": [
        {
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          "value": "NVD-CWE-noinfo"
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  "descriptions": [
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      "lang": "en",
      "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a discrepancy between browser cookie parsing and parse() handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse(), allowing attacker-controlled cookies to override legitimate ones. This vulnerability is fixed in 4.12.12."
    },
    {
      "lang": "es",
      "value": "Hono es un framework de aplicación web que proporciona soporte para cualquier entorno de ejecución de JavaScript. Antes de 4.12.12, una discrepancia entre el análisis de cookies del navegador y el manejo de parse() permite que las protecciones de prefijo de cookie sean eludidas. Nombres de cookie que son tratados como distintos por el navegador pueden ser normalizados a la misma clave por parse(), permitiendo que las cookies controladas por el atacante anulen las legítimas. Esta vulnerabilidad se corrige en 4.12.12."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "matchCriteriaId": "295EEF12-243F-4561-B181-C19451B5285C",
              "versionEndIncluding": "4.12.11"
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          "operator": "OR"
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  ],
  "sourceIdentifier": "security-advisories@github.com"
}