Vulnerabilities in pkg:npm/undici

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pmjh-fq2x-6v4x",
  "modified" : "2026-09-29T18:22:35Z",
  "published" : "2026-09-29T18:22:34Z",
  "aliases" : [ "CVE-2026-18149" ],
  "summary" : "undici vulnerable to Denial of Service via orphaned RetryHandler response body",
  "details" : "### Impact\n\nundici's `RetryHandler` can leave a response body pending indefinitely. When a retried request receives a non-retryable response after a truncated one, the original `response.body` held by the application is never settled, so reads such as `response.body.text()` hang and `bodyTimeout` does not fire. A malicious server can repeat this to accumulate pending promises and streams, leading to denial of service.\n\n### Patches\n\nPatched in undici v7.29.1 and v8.10.2.\n\n### Workarounds\n\nImpose an independent request deadline and destroy the response body when it expires. `bodyTimeout` alone does not prevent this.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "undici"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.11.0"
      }, {
        "fixed" : "7.29.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "undici"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.10.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/security/advisories/GHSA-pmjh-fq2x-6v4x"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-18149"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/commit/3c6726599cea8646384dde846c97d630da472a74"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/commit/e905b5b87e6953bcc542af90557b2fee5b7b5974"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/3892751"
  }, {
    "type" : "WEB",
    "url" : "https://cna.openjsf.org/security-advisories.html"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nodejs/undici"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/releases/tag/v7.29.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/nodejs/undici/releases/tag/v8.10.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-772" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-29T18:22:34Z",
    "nvd_published_at" : "2026-09-04T18:17:49Z"
  }
}