FKIE_CVE-2026-25224

Vulnerability from fkie_nvd - Published: 2026-02-03 22:16 - Updated: 2026-02-10 19:24
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify’s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation. This issue has been patched in version 5.7.3.
References
security-advisories@github.comhttps://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37Patch
security-advisories@github.comhttps://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77cVendor Advisory
security-advisories@github.comhttps://hackerone.com/reports/3524779Permissions Required
Impacted products
Vendor Product Version
fastify fastify *
To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "Fastify is a fast and low overhead web framework, for Node.js. Prior to version 5.7.3, a denial-of-service vulnerability in Fastify\u2019s Web Streams response handling can allow a remote client to exhaust server memory. Applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted. A slow or non-reading client can trigger unbounded buffering when backpressure is ignored, leading to process crashes or severe degradation. This issue has been patched in version 5.7.3."
    },
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      "lang": "es",
      "value": "Fastify es un framework web r\u00e1pido y de baja sobrecarga, para Node.js. Antes de la versi\u00f3n 5.7.3, una vulnerabilidad de denegaci\u00f3n de servicio en el manejo de respuestas de Web Streams de Fastify puede permitir a un cliente remoto agotar la memoria del servidor. Las aplicaciones que devuelven un ReadableStream (o una Response con un cuerpo de Web Stream) a trav\u00e9s de reply.send() se ven afectadas. Un cliente lento o que no lee puede desencadenar un almacenamiento en b\u00fafer ilimitado cuando se ignora la contrapresi\u00f3n, lo que lleva a ca\u00eddas del proceso o una degradaci\u00f3n severa. Este problema ha sido parcheado en la versi\u00f3n 5.7.3."
    }
  ],
  "id": "CVE-2026-25224",
  "lastModified": "2026-02-10T19:24:48.703",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
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        "impactScore": 1.4,
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        "type": "Secondary"
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  "published": "2026-02-03T22:16:31.290",
  "references": [
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      "tags": [
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      "url": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37"
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c"
    },
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      "tags": [
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      "url": "https://hackerone.com/reports/3524779"
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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