{
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          "product": "fastify",
          "vendor": "fastify",
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              "version": "\u003c 5.7.3"
            }
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          "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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            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-03T21:21:35.437Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c"
        },
        {
          "name": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37"
        },
        {
          "name": "https://hackerone.com/reports/3524779",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/3524779"
        }
      ],
      "source": {
        "advisory": "GHSA-mrq3-vjjr-p77c",
        "discovery": "UNKNOWN"
      },
      "title": "Fastify Vulnerable to DoS via Unbounded Memory Allocation in sendWebStream"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-25224",
    "datePublished": "2026-02-03T21:21:35.437Z",
    "dateReserved": "2026-01-30T14:44:47.327Z",
    "dateUpdated": "2026-02-03T21:21:35.437Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-25224\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-02-03T22:16:31.290\",\"lastModified\":\"2026-02-03T22:16:31.290\",\"vulnStatus\":\"Received\",\"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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":3.7,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.2,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"references\":[{\"url\":\"https://github.com/fastify/fastify/commit/eb11156396f6a5fedaceed0140aed2b7f026be37\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://hackerone.com/reports/3524779\",\"source\":\"security-advisories@github.com\"}]}}"
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