{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "6.28.0"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.29.0"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.9.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "01a912e49a50c48009ed2639d2a457a6ec26752a"
            },
            {
              "introduced": "1cfe0949053aac6267f11b919cee9315a27f1fd6"
            },
            {
              "fixed": "9e38fc121d2eb26086d41c7d9379b47a6fada1c5"
            },
            {
              "introduced": "d7fbba51772deecb830a297647456a5e9f9fec57"
            },
            {
              "fixed": "21a8e1ed1843e74c3004a2926c12bb0ceaca6b71"
            }
          ],
          "repo": "https://github.com/nodejs/undici",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8xcm-r25x-g524"
  ],
  "database_specific": {
    "cna_assigner": "openjs",
    "cwe_ids": [
      "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16728.json"
  },
  "details": "undici's retry interceptor can deliver a response whose body length does not match the Content-Length header exposed to the application after a retry or resume of a partial response. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, a malicious or faulty upstream can return a partial response with a mismatched framing header, close the socket early, and have the retry interceptor assemble a body of a different length while the original Content-Length stays attached. Applications that use the retry interceptor and forward upstream headers and bodies downstream, such as proxies or gateways, may then emit an invalid HTTP response with a stale Content-Length, leading to downstream response desynchronization, connection hangs, or response corruption. Exploitation requires the retry interceptor enabled, an upstream returning a mismatched partial response, and a downstream forwarder that does not remove or recalculate Content-Length. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.",
  "id": "CVE-2026-16728",
  "modified": "2026-08-01T03:32:48.197915325Z",
  "published": "2026-07-29T20:59:02.314Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16728.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nodejs/undici/security/advisories/GHSA-8xcm-r25x-g524"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16728"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "undici vulnerable to downstream response desynchronization via retry interceptor"
}