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CVE-2026-39806 HTTP/1 chunked decoder infinite loop on requests with trailer fields in bandit

🗓️ 13 May 2026 13:36:17Reported by EEFType 
cvelist
 cvelist
🔗 www.cve.org👁 37 Views

CVE-2026-39806: Bandit HTTP/1 chunked decoder loops on trailer fields, enabling remote denial.

Related
Affected
Refs
[
  {
    "collectionURL": "https://repo.hex.pm",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "'Elixir.Bandit.HTTP1.Socket'"
    ],
    "packageName": "bandit",
    "packageURL": "pkg:hex/bandit",
    "product": "bandit",
    "programFiles": [
      "lib/bandit/http1/socket.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.Bandit.HTTP1.Socket':do_read_chunked_data!/5"
      }
    ],
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "1.11.1",
        "status": "affected",
        "version": "1.6.1",
        "versionType": "semver"
      }
    ]
  },
  {
    "collectionURL": "https://github.com",
    "cpes": [
      "cpe:2.3:a:mtrudel:bandit:*:*:*:*:*:*:*:*"
    ],
    "defaultStatus": "unaffected",
    "modules": [
      "'Elixir.Bandit.HTTP1.Socket'"
    ],
    "packageName": "mtrudel/bandit",
    "packageURL": "pkg:github/mtrudel/bandit",
    "product": "bandit",
    "programFiles": [
      "lib/bandit/http1/socket.ex"
    ],
    "programRoutines": [
      {
        "name": "'Elixir.Bandit.HTTP1.Socket':do_read_chunked_data!/5"
      }
    ],
    "repo": "https://github.com/mtrudel/bandit",
    "vendor": "mtrudel",
    "versions": [
      {
        "lessThan": "ae3520dfdbfab115c638f8c7f6f6b805db34e1ab",
        "status": "affected",
        "version": "e73e379ab59840e8561b5730878f16e29ab06217",
        "versionType": "git"
      }
    ]
  }
]

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