{
  "cveId": "CVE-2025-66577",
  "url": "https://patchblox.com/security/cve/CVE-2025-66577",
  "summary": "CVE-2025-66577 is fixed in 4 products on 1 platform, first by libcpp-httplib0 0.10.3\u002Bds-1ubuntu0.1~esm1, released December 5, 2025. 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 0.27.0, a vulnerability allows attacker-controlled HTTP headers to influence server-visible metadata, logging, and authorization decisions. An attacker can supply X-Forwarded-For or X-Real-IP headers which get accepted unconditionally by get_client_ip() in docker/main.cc, causing access and error logs (nginx_access_logger / nginx_error_logger) to record spoofed client IPs (log poisoning / audit evasion). This vulnerability is fixed in 0.27.0.",
  "published": "2025-12-05T11:15:00Z",
  "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": 0.00294,
  "epssPercentile": 0.22144,
  "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-2025-66577",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-66577",
      "released": "2025-12-05T19:15:52Z"
    },
    {
      "platform": "linux",
      "product": "cpp-httplib",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.22.0-160000.3.1",
      "fix": "OPENSUSE-SU-2026:20056-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20056-1",
      "released": "2026-01-15T22:11:25Z"
    },
    {
      "platform": "linux",
      "product": "cpp-httplib",
      "release": "sles 16.0",
      "fixedVersion": "0.22.0-160000.3.1",
      "fix": "SUSE-SU-2026:20090-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-20090-1",
      "released": "2026-01-15T22:11:51Z"
    },
    {
      "platform": "linux",
      "product": "libcpp-httplib0",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.10.3\u002Bds-1ubuntu0.1~esm1",
      "fix": "libcpp-httplib0 0.10.3\u002Bds-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcpp-httplib0-0.10.3-ds-1ubuntu0.1-esm1",
      "released": "2025-12-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libcpp-httplib0.14t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "0.14.3\u002Bds-1.1ubuntu0.1~esm1",
      "fix": "libcpp-httplib0.14t64 0.14.3\u002Bds-1.1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcpp-httplib0.14t64-0.14.3-ds-1.1ubuntu0.1-esm1",
      "released": "2025-12-05T11:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libcpp-httplib0.18",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "0.18.7-1ubuntu0.25.10.1",
      "fix": "libcpp-httplib0.18 0.18.7-1ubuntu0.25.10.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libcpp-httplib0.18-0.18.7-1ubuntu0.25.10.1",
      "released": "2025-12-05T11:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}