{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
                  },
                  {
                    "fixed": "493e8bf83a391548e5101792276ab3fc428fa76c"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "introduced": "2.0.0-beta.1"
                  },
                  {
                    "fixed": "4.9.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "original_tag": "4.9.0",
                "range": [
                  {
                    "fixed": "0f5db333d43600e7b9fb9346143b4e9fdb8924ea"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "range": [
                  {
                    "fixed": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "493e8bf83a391548e5101792276ab3fc428fa76c"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
            },
            {
              "fixed": "493e8bf83a391548e5101792276ab3fc428fa76c"
            },
            {
              "introduced": "e0f288721bb99f4f423172f7321875fcbc96ff86"
            },
            {
              "fixed": "0f5db333d43600e7b9fb9346143b4e9fdb8924ea"
            },
            {
              "fixed": "dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
            }
          ],
          "repo": "https://github.com/benoitc/hackney",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-409",
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97200.json"
  },
  "details": "Allocation of Resources Without Limits or Throttling vulnerability in hackney_conn in benoitc hackney allows a malicious HTTP server to exhaust client memory via an oversized or highly compressed response body. hackney:request/5 and hackney:body/1 return the whole response body, and nothing bounds how much the connection process buffers. Any server the client requests can trigger it.\n\nhackney_conn:read_full_body/2 and the HTTP/2 and HTTP/3 accumulators append every chunk until the body ends. With {auto_decompress, true} the buffered body is then inflated in one step with zlib:gunzip/1 or zlib:inflate/2, which return the whole output at once.\n\nThis issue affects hackney: from 2.0.0-beta.1 before 4.9.0.",
  "id": "CVE-2026-97200",
  "modified": "2026-10-29T02:30:52.072502538Z",
  "published": "2026-10-26T13:49:40.392Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-97200.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-97200"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97200.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/benoitc/hackney/releases/tag/4.9.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97200"
    },
    {
      "type": "FIX",
      "url": "https://github.com/benoitc/hackney/commit/493e8bf83a391548e5101792276ab3fc428fa76c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/benoitc/hackney/commit/dc41b79339ca0c41e16d3f2dd17172bc2de855d6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/benoitc/hackney/pull/980"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/benoitc/hackney"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Unbounded response body buffering and decompression in hackney"
}