{"schema":"threatline.record/2","record":{"id":"CVE-2026-116266","aliases":[],"summary":"MIME::Head versions from 5.518 before 5.521 for Perl decode a partly encoded multipart boundary without flagging the parse as ambiguous","details":"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.","categories":["Unclassified"],"product":"","vendor":"","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116266","source_modified_at":"2026-10-28T17:32:28.565Z","fetched_at":"2026-10-28T20:58:01.013507Z","product":null,"vendor":null,"versions":[{"lessThan":"5.521","status":"affected","version":"5.518","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116266","source_modified_at":"2026-10-28T17:32:28.565Z","fetched_at":"2026-10-28T20:58:01.013507Z","package":{"name":null,"ecosystem":null},"version":"5.521","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T17:32:28.565Z","modified_at":"2026-10-28T17:32:28.565Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116266","fetched_at":"2026-10-28T20:58:01.013507Z","source_modified_at":"2026-10-28T17:32:28.565Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes","tags":["release-notes"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-28T17:32:28.565Z","content_hash":"06d960be445a72f31adc2bfaa9799b6effd8efb90ff9e87d6aa79a7656066865"}}