{
   "document": {
      "category": "csaf_security_advisory",
      "csaf_version": "2.0",
      "distribution": {
         "tlp": {
            "label": "WHITE",
            "url": "https://www.first.org/tlp/"
         }
      },
      "lang": "en",
      "notes": [
         {
            "category": "description",
            "text": "MIME::Parser::FileUnder versions before 5.521 for Perl reuse a pre-created output directory and follow symlinks in it, letting local users redirect attachment writes.\n\nEach message is written to a directory named msg-<time>-<pid>-<n> under the output base, and an existing directory of that name is used as is. A file name counts as unused when nothing exists at that path, which holds for a dangling symlink, and the body file is then opened in a way that follows the link.\n\nWhen the output base is writable by other users, as with output_under(\"/tmp\"), a local user can pre-create the directory with a symlink named like an attachment. The parser then writes the attachment to the link target with the privileges of the parsing process.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-MIME-tools-2026-116271 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-mime-tools-2026-116271.json"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes",
            "url": "https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes"
         },
         {
            "category": "external",
            "summary": "CVE-2026-116271 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116271"
         }
      ],
      "title": "MIME-tools vulnerability",
      "tracking": {
         "current_release_date": "2026-10-28T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-MIME-tools-2026-116271",
         "initial_release_date": "2026-10-28T00:00:00",
         "revision_history": [
            {
               "date": "2026-10-28T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/<5.521",
                  "product": {
                     "name": "MIME-tools less than 5.521",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/MIME-tools"
                     }
                  }
               },
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>=5.521",
                  "product": {
                     "name": "MIME-tools greater than or equal 5.521",
                     "product_id": "CSAFPID-0002",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/MIME-tools"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "MIME-tools"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2026-116271",
         "cwe": {
            "id": "CWE-59",
            "name": "Improper Link Resolution Before File Access ('Link Following')"
         },
         "notes": [
            {
               "category": "description",
               "text": "MIME::Parser::FileUnder versions before 5.521 for Perl reuse a pre-created output directory and follow symlinks in it, letting local users redirect attachment writes.\n\nEach message is written to a directory named msg-<time>-<pid>-<n> under the output base, and an existing directory of that name is used as is. A file name counts as unused when nothing exists at that path, which holds for a dangling symlink, and the body file is then opened in a way that follows the link.\n\nWhen the output base is writable by other users, as with output_under(\"/tmp\"), a local user can pre-create the directory with a symlink named like an attachment. The parser then writes the attachment to the link target with the privileges of the parsing process.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "fixed": [
               "CSAFPID-0002"
            ],
            "known_affected": [
               "CSAFPID-0001"
            ]
         }
      }
   ]
}