{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.1.0"
              },
              {
                "fixed": "1.10.1"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "47889857fb36f07606ad9c2e52080d202d419058"
            },
            {
              "fixed": "9e9ae10cb6321879b8cf74dea3dd3e91d0e72f41"
            },
            {
              "fixed": "60089586ec7adc9fddb09f69a2f5919ba9ac7f33"
            },
            {
              "fixed": "c82377838dc6e275ef40bafa664fbcdf50270c60"
            }
          ],
          "repo": "https://github.com/elixir-mint/mint",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rj5m-69wp-cxq9"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82672.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "60089586ec7adc9fddb09f69a2f5919ba9ac7f33"
          },
          {
            "fixed": "c82377838dc6e275ef40bafa664fbcdf50270c60"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on a pooled connection, enabling response-queue poisoning against subsequent requests that share the connection.\n\nMint.HTTP1.Parse.chunk_size/1 in lib/mint/http1/parse.ex stops at the first non-hexadecimal byte of a chunked response's chunk-size line and returns the remainder unexamined. Mint.HTTP1.decode_body/5 in lib/mint/http1.ex then discards every byte up to the CRLF with Parse.ignore_until_crlf/1, so the accepted grammar is a run of hex digits followed by arbitrary bytes, where RFC 9112 permits only a ;-introduced chunk extension. Lines such as 5ZZZZZ and 5 9 are accepted as chunk size 5, and 0ZZZZ is accepted as the terminating chunk that ends the message body. An RFC-strict intermediary rejects such a line while Mint accepts it, so the two disagree on chunk boundaries and on where the response ends.\n\nThis issue affects mint: from 0.1.0 before 1.10.1.",
  "id": "CVE-2026-82672",
  "modified": "2026-09-23T03:30:27.635157806Z",
  "published": "2026-09-19T17:00:31.648Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-82672.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82672"
    },
    {
      "type": "WEB",
      "url": "https://repo.hex.pm"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82672.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/elixir-mint/mint/security/advisories/GHSA-rj5m-69wp-cxq9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82672"
    },
    {
      "type": "FIX",
      "url": "https://github.com/elixir-mint/mint/commit/60089586ec7adc9fddb09f69a2f5919ba9ac7f33"
    },
    {
      "type": "FIX",
      "url": "https://github.com/elixir-mint/mint/commit/c82377838dc6e275ef40bafa664fbcdf50270c60"
    },
    {
      "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:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Unvalidated chunk-size line tail in Mint HTTP/1 client enables response smuggling against strict intermediaries on pooled connections"
}