{
  "cveId": "CVE-2026-28434",
  "url": "https://patchblox.com/security/cve/CVE-2026-28434",
  "summary": "CVE-2026-28434 is fixed in cpp-httplib on 1 platform by DEBIAN-CVE-2026-28434 (version 0.41.0\u002Bds-3), released March 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "cpp-httplib: cpp-httplib is a C\u002B\u002B11 single-file header-only cross platform HTTP/HTTPS library",
  "description": "cpp-httplib is a C\u002B\u002B11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, when a request handler throws a C\u002B\u002B exception and the application has not registered a custom exception handler via set_exception_handler(), the library catches the exception and writes its message directly into the HTTP response as a header named EXCEPTION_WHAT. This header is sent to whoever made the request, with no authentication check and no special configuration required to trigger it. The behavior is on by default. A developer who does not know to opt in to set_exception_handler() will ship a server that leaks internal exception messages to any client. This vulnerability is fixed in 0.35.0.",
  "published": "2026-03-04T20:16:19Z",
  "severity": "medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
  "epss": 0.00349,
  "epssPercentile": 0.28742,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "cpp-httplib",
      "release": "Debian 14",
      "fixedVersion": "0.41.0\u002Bds-3",
      "fix": "DEBIAN-CVE-2026-28434",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-28434",
      "released": "2026-03-04T20:16:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}