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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              "criteria": "cpe:2.3:a:fastify:fastify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "70F0A157-C97E-4AB3-8B64-D6B21301B2DD",
              "versionEndExcluding": "5.7.3",
              "vulnerable": true
            }
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          "operator": "OR"
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  "cveTags": [],
  "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."
    }
  ],
  "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"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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  },
  "published": "2026-02-03T22:16:31.290",
  "references": [
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      "tags": [
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    },
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      "source": "security-advisories@github.com",
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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