{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-2581",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-2581",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-12T20:13:19.571Z",
    "updatedAt": "2026-03-13T18:04:58.799Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "undici is vulnerable to Unbounded Memory Consumption in in Undici's DeduplicationHandler via Response Buffering leads to DoS",
      "summary": "This is an uncontrolled resource consumption vulnerability (CWE-400) that can lead to Denial of Service (DoS).\n\nIn vulnerable Undici versions, when interceptors.deduplicate() is enabled, response data for deduplicated requests could be accumulated in memory for downstream handlers. An attacker-controlled or untrusted upstream endpoint can exploit this with large/chunked responses and concurrent identical requests, causing high memory usage and potential OOM process termination.\n\nImpacted users are applications that use Undici’s deduplication interceptor against endpoints that may produce large or long-lived response bodies.\n\nPatchesThe issue has been patched by changing deduplication behavior to stream response chunks to downstream handlers as they arrive (instead of full-body accumulation), and by preventing late deduplication when body streaming has already started.\n\nUsers should upgrade to the first official Undici (and Node.js, where applicable) releases that include this patch.",
      "affected": [
        {
          "vendor": "undici",
          "product": "undici",
          "packageName": "undici",
          "collectionURL": "https://github.com/nodejs/undici/",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "< 6.24.0; 7.0.0 < 7.24.0",
              "status": "affected"
            },
            {
              "version": "6.24.0: 7.24.0",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  }
}