FKIE_CVE-2026-29085

Vulnerability from fkie_nvd - Published: 2026-03-04 23:16 - Updated: 2026-03-06 18:03
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using streamSSE() in Streaming Helper, the event, id, and retry fields were not validated for carriage return (\r) or newline (\n) characters. Because the SSE protocol uses line breaks as field delimiters, this could allow injection of additional SSE fields within the same event frame if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.
References
security-advisories@github.comhttps://github.com/honojs/hono/commit/f4123ed9ea3c7c52380cc99a079a4d773838846ePatch
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-p6xx-57qc-3wxrVendor Advisory
Impacted products
Vendor Product Version
hono hono *
To clipboard 

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    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "8ADA9966-4575-41CC-8905-E1F4E4CB5CA6",
              "versionEndExcluding": "4.12.4",
              "vulnerable": true
            }
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          "negate": false,
          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using streamSSE() in Streaming Helper, the event, id, and retry fields were not validated for carriage return (\\r) or newline (\\n) characters. Because the SSE protocol uses line breaks as field delimiters, this could allow injection of additional SSE fields within the same event frame if untrusted input was passed into these fields. This issue has been patched in version 4.12.4."
    },
    {
      "lang": "es",
      "value": "Hono es un framework de aplicaci\u00f3n web que proporciona soporte para cualquier entorno de ejecuci\u00f3n de JavaScript. Antes de la versi\u00f3n 4.12.4, al usar streamSSE() en Streaming Helper, los campos event, id y retry no se validaban en busca de caracteres de retorno de carro (\\r) o nueva l\u00ednea (\\n). Debido a que el protocolo SSE utiliza saltos de l\u00ednea como delimitadores de campo, esto podr\u00eda permitir la inyecci\u00f3n de campos SSE adicionales dentro del mismo marco de evento si se pasaba entrada no confiable a estos campos. Este problema ha sido parcheado en la versi\u00f3n 4.12.4."
    }
  ],
  "id": "CVE-2026-29085",
  "lastModified": "2026-03-06T18:03:12.037",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
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        "impactScore": 2.5,
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        "type": "Secondary"
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  "published": "2026-03-04T23:16:10.423",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/honojs/hono/commit/f4123ed9ea3c7c52380cc99a079a4d773838846e"
    },
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      "tags": [
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      ],
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    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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