{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.1.2"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "32028ce3ce79cef38df5d27a297e5b20680f0065"
            }
          ],
          "repo": "https://github.com/monicahq/monica",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in app/Providers/AppServiceProvider.php, combined with the default misconfiguration where the \"app.force_url\" is not set and default is \"false\". The application generates absolute URLs (such as those used in password reset emails) using the user-supplied Host header. This allows remote attackers to poison the password reset link sent to a victim,",
  "id": "CVE-2026-26747",
  "modified": "2026-03-10T21:52:01.563699164Z",
  "published": "2026-02-20T17:25:56.023Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://github.com/monicahq/monica"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/hungnqdz/cve-research/blob/main/CVE-2026-26747.md"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}