CVE-2026-116266

{"id": "CVE-2026-116266", "cveTags": [], "metrics": {}, "affected": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "affectedData": [{"repo": "https://salsa.debian.org/dskoll/mime-tools", "modules": ["MIME::Head"], "versions": [{"status": "affected", "version": "5.518", "lessThan": "5.521", "versionType": "custom"}], "packageURL": "pkg:cpan/MIME-tools", "packageName": "MIME-tools", "programFiles": ["lib/MIME/Head.pm", "lib/MIME/Field/ParamVal.pm"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "MIME::Head::multipart_boundary"}, {"name": "MIME::Field::ParamVal::parse_params"}]}]}], "published": "2026-10-28T18:17:13.017", "references": [{"url": "https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-436"}]}], "descriptions": [{"lang": "en", "value": "MIME::Head versions from 5.518 before 5.521 for Perl decode a partly encoded multipart boundary without flagging the parse as ambiguous.\n\nThe multipart_boundary() method decodes RFC 2047 encoded words anywhere in the boundary, but the ambiguity check only fires when the whole value is one encoded word. A boundary such as abc=?us-ascii?Q?def?= is used as abcdef, and ambiguous_content() returns false.\n\nEncoded words are not allowed in parameters, so other mail readers split the message on the literal value. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it."}], "lastModified": "2026-10-29T15:11:53.000", "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}