{"api_version":"1","generated_at":"2026-11-05T10:27:14+00:00","cve":"CVE-2026-116272","urls":{"html":"https://cve.report/CVE-2026-116272","api":"https://cve.report/api/cve/CVE-2026-116272.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-116272","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116272"},"summary":{"title":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment","description":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment.\n\nA parameter written boundary((c))=\"A\" or boundary(\\))=\"A\" is stored under that literal name rather than as boundary. A second boundary parameter is then not reported as a duplicate, and MIME::Parser splits the message on it.\n\nReaders that skip comments as RFC 5322 allows take the first boundary instead. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-10-28 18:17:13","updated_at":"2026-10-29 15:11:53"},"problem_types":["CWE-436","CWE-436 CWE-436 Interpretation Conflict"],"metrics":[],"references":[{"url":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes","name":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116272","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116272","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"Upgrade to MIME-tools 5.521 or later.","time":"","lang":"en"}],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"116272","cve":"CVE-2026-116272","epss":"0.001770000","percentile":"0.072390000","score_date":"2026-10-29","updated_at":"2026-10-30 00:05:32"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["MIME::Field::ParamVal"],"packageName":"MIME-tools","packageURL":"pkg:cpan/MIME-tools","programFiles":["lib/MIME/Field/ParamVal.pm"],"programRoutines":[{"name":"MIME::Field::ParamVal::parse_params"}],"repo":"https://salsa.debian.org/dskoll/mime-tools","versions":[{"lessThan":"5.521","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment.\n\nA parameter written boundary((c))=\"A\" or boundary(\\))=\"A\" is stored under that literal name rather than as boundary. A second boundary parameter is then not reported as a duplicate, and MIME::Parser splits the message on it.\n\nReaders that skip comments as RFC 5322 allows take the first boundary instead. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-436","description":"CWE-436 Interpretation Conflict","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-28T17:34:25.862Z","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec"},"references":[{"tags":["release-notes"],"url":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes"}],"solutions":[{"lang":"en","value":"Upgrade to MIME-tools 5.521 or later."}],"source":{"discovery":"UNKNOWN"},"title":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment","x_generator":{"engine":"cpansec-cna-tool 0.1"}}},"cveMetadata":{"assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","assignerShortName":"CPANSec","cveId":"CVE-2026-116272","datePublished":"2026-10-28T17:34:25.862Z","dateReserved":"2026-10-25T18:05:02.236Z","dateUpdated":"2026-10-28T17:34:25.862Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 18:17:13","lastModifiedDate":"2026-10-29 15:11:53","problem_types":["CWE-436","CWE-436 CWE-436 Interpretation Conflict"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"116272","Ordinal":"1","Title":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag","CVE":"CVE-2026-116272","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"116272","Ordinal":"1","NoteData":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag a duplicate boundary parameter whose name contains a nested comment.\n\nA parameter written boundary((c))=\"A\" or boundary(\\))=\"A\" is stored under that literal name rather than as boundary. A second boundary parameter is then not reported as a duplicate, and MIME::Parser splits the message on it.\n\nReaders that skip comments as RFC 5322 allows take the first boundary instead. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.","Type":"Description","Title":"MIME::Field::ParamVal versions before 5.521 for Perl do not flag"}]}}}