{
  "cveId": "CVE-2026-116265",
  "url": "https://patchblox.com/security/cve/CVE-2026-116265",
  "summary": "CVE-2026-116265 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-116265, released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libmime-tools-perl: MIME::Field::ParamVal versions before 5.521 for Perl do not flag an ambiguous multipart boundary written as RFC 2231...",
  "description": "MIME::Field::ParamVal versions before 5.521 for Perl do not flag an ambiguous multipart boundary written as RFC 2231 continuations.  The boundary ambiguity checks look only at a plain boundary= parameter, and a boundary split into RFC 2231 sections (boundary*0=, boundary*1= and so on) is joined after they have run. A repeated section number is concatenated rather than reported as a duplicate. From version 5.518, an encoded word or trailing whitespace in such a boundary also goes unflagged, although multipart_boundary() decodes or strips it.  A remote sender can make MIME::Parser split a message on a different boundary than other mail readers, hiding an attachment from a filter that relies on ambiguous_content() while the recipient\u0027s mail client shows it.",
  "published": "2026-10-22T11:55:20Z",
  "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": 0.00206,
  "epssPercentile": 0.10702,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libmime-tools-perl",
      "release": "Debian 14",
      "fixedVersion": "5.522-1",
      "fix": "DEBIAN-CVE-2026-116265",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-116265",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "perl-MIME-tools",
      "release": "Fedora 43",
      "fixedVersion": "5.522-1.fc43",
      "fix": "FEDORA-2026-A415B3BF48",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-a415b3bf48",
      "released": "2026-11-07T01:05:44Z"
    },
    {
      "platform": "linux",
      "product": "perl-MIME-tools",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "5.522.0-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:22226-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22226-1",
      "released": "2026-11-07T00:47:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}