{"id":"CVE-2026-116272","published":"2026-10-28T18:17:13.690","lastModified":"2026-10-28T18:17:13.690","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-436"],"vendors":[],"products":[],"references":[{"url":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}