{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "1.9.3"
              },
              {
                "fixed": "1.10.0"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "f0b72c0b2363c98d0a220019d108ac6141715428"
            },
            {
              "fixed": "75c8be1fada9983d6972418d162d55b6e62d507e"
            },
            {
              "fixed": "bd2a4e7513594997c140cfef9fe0e968712fb588"
            }
          ],
          "repo": "https://github.com/elixir-mint/mint",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7p8w-j234-7qc8"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82729.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "fc7d16538db7e40b56ed489f08683225cb0197fa"
          },
          {
            "fixed": "bd2a4e7513594997c140cfef9fe0e968712fb588"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Inefficient Algorithmic Complexity vulnerability in elixir-mint mint allows a remote HTTP server to exhaust CPU on the client host and cause a denial of service.\n\nparse_hex_prefix/2 in lib/mint/http1/parse.ex folds each hex digit of a chunked response's chunk-size field into an arbitrary-precision accumulator with acc * 16 + digit and imposes no limit on the digit count. Because the accumulator grows without bound, the multiplication is not constant time and one pass over N digits costs O(N squared). handle_data/2 prepends conn.buffer and re-parses from the start on every socket message, so a server that dribbles the digits out in small packets makes the client pay that cost repeatedly. A run of roughly 512,000 hex digits costs over ten seconds of CPU in a single pass, measured on stock defaults. The parser reaches this state after a valid status line and a complete, valid header section, so an intermediary inspecting only headers sees an ordinary 200 response.\n\nThis issue affects mint: from 1.9.3 before 1.10.0.",
  "id": "CVE-2026-82729",
  "modified": "2026-09-07T03:30:49.562900894Z",
  "published": "2026-09-04T14:31:20.562Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82729.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82729"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82729.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-7p8w-j234-7qc8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82729"
    },
    {
      "type": "FIX",
      "url": "https://github.com/elixir-mint/mint/commit/bd2a4e7513594997c140cfef9fe0e968712fb588"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/elixir-mint/mint"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Quadratic chunk-size parsing in Mint.HTTP1.Parse allows CPU-exhaustion DoS"
}