{
  "cveId": "CVE-2025-46728",
  "url": "https://patchblox.com/security/cve/CVE-2025-46728",
  "summary": "CVE-2025-46728 is fixed in cpp-httplib on 1 platform, first by DEBIAN-CVE-2025-46728, released May 6, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "cpp-httplib: cpp-httplib is a C\u002B\u002B header-only HTTP/HTTPS server and client library",
  "description": "cpp-httplib is a C\u002B\u002B header-only HTTP/HTTPS server and client library. Prior to version 0.20.1, the library fails to enforce configured size limits on incoming request bodies when \u0060Transfer-Encoding: chunked\u0060 is used or when no \u0060Content-Length\u0060 header is provided. A remote attacker can send a chunked request without the terminating zero-length chunk, causing uncontrolled memory allocation on the server. This leads to potential exhaustion of system memory and results in a server crash or unresponsiveness. Version 0.20.1 fixes the issue by enforcing limits during parsing. If the limit is exceeded at any point during reading, the connection is terminated immediately. A short-term workaround through a Reverse Proxy is available. If updating the library immediately is not feasible, deploy a reverse proxy (e.g., Nginx, HAProxy) in front of the \u0060cpp-httplib\u0060 application. Configure the proxy to enforce maximum request body size limits, thereby stopping excessively large requests before they reach the vulnerable library code.",
  "published": "2025-05-06T01:15:50Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00675,
  "epssPercentile": 0.52431,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "cpp-httplib",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.18.7-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2025-46728",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-46728",
      "released": "2025-05-06T01:15:50Z"
    },
    {
      "platform": "linux",
      "product": "cpp-httplib",
      "release": "Debian 14",
      "fixedVersion": "0.25.0\u002Bds-3",
      "fix": "DEBIAN-CVE-2025-46728",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-46728",
      "released": "2025-05-06T01:15:50Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}