{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "1.17.1"
              },
              {
                "last_affected": "1.33.106"
              }
            ]
          },
          "events": [
            {
              "introduced": "e4d2881a3aec8fa6f5b3f454bddb602e682ed75b"
            },
            {
              "last_affected": "8b62af10de5cfc5eef418ab8dfd6d5b4e456bdfa"
            }
          ],
          "repo": "https://github.com/brave/brave-browser",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "In Brave Desktop 1.17 through 1.33 before 1.33.106, when CNAME-based adblocking and a proxying extension with a SOCKS fallback are enabled, additional DNS requests are issued outside of the proxying extension using the system's DNS settings, resulting in information disclosure. NOTE: this issue exists because of an incomplete fix for CVE-2021-21323 and CVE-2021-22916.",
  "id": "CVE-2021-45884",
  "modified": "2026-04-01T23:09:47.539270076Z",
  "published": "2021-12-27T22:15:07.847Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://github.com/brave/brave-browser/issues/20079"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/1377864"
    },
    {
      "type": "FIX",
      "url": "https://github.com/brave/brave-core/pull/10742"
    },
    {
      "type": "FIX",
      "url": "https://github.com/brave/brave-browser/issues/19070"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}