{
  "cveId": "CVE-2026-84379",
  "url": "https://patchblox.com/security/cve/CVE-2026-84379",
  "summary": "CVE-2026-84379 is fixed in python-httpx2 on 1 platform by DEBIAN-CVE-2026-84379 (version 2.12.0-1), released September 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python-httpx2: HTTPX2 is a next generation HTTP client for Python",
  "description": "HTTPX2 is a next generation HTTP client for Python. Prior to 2.11.0, FileField.render_headers() in src/httpx2/httpx2/_multipart.py directly interpolates attacker-controlled content_type values and custom headers from the files= three-element (filename, content, content_type) tuple and the files= four-element (filename, content, content_type, headers) tuple into multipart/form-data part headers without validating header names or values. CR or LF characters can terminate a part header, inject additional part headers, or end the part header block early, allowing a downstream multipart parser to treat attacker-supplied lines as genuine headers and potentially alter part semantics or bypass header-based checks. This issue is fixed in version 2.11.0.",
  "published": "2026-09-02T18:21:29Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
  "epss": 0.00317,
  "epssPercentile": 0.24834,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-httpx2",
      "release": "Debian 14",
      "fixedVersion": "2.12.0-1",
      "fix": "DEBIAN-CVE-2026-84379",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84379",
      "released": "2026-09-08T02:27:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}