{"id":"CVE-2026-116264","aliases":[],"cve":{"records":[{"id":"CVE-2026-116264","source":"CPANSec","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-25T18:05:02.235Z","published":"2026-10-28T17:31:52.187Z","modified":"2026-10-28T17:31:52.187Z"}],"publishers":[{"name":"CPANSec","role":"CNA","organizationId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","modified":"2026-10-28T17:31:52.187Z"}],"references":[{"url":"https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes","tags":["release-notes"],"source":"CPANSec"}],"weaknesses":[{"id":"CWE-436","description":"CWE-436 Interpretation Conflict","source":"CPANSec"}],"applicability":[],"prioritization":[]},"title":"MIME::Field::ParamVal versions before 5.521 for Perl allow one invalid Content-Type parameter to hide the parameters after it, including the multipart boundary","titleSource":"CPANSec","descriptionSource":"CPANSec","description":"MIME::Field::ParamVal versions before 5.521 for Perl allow one invalid Content-Type parameter to hide the parameters after it, including the multipart boundary.\n\nParameter parsing stops at the first parameter whose name it cannot read, such as x:y=1 or a name containing an 8-bit byte, and drops every parameter after it. When the boundary is among them, MIME::Parser keeps the multipart body as a single undecoded part without marking the parse as ambiguous.\n\nMail readers that skip the invalid parameter still find the boundary. A remote sender can hide an attachment from a filter that relies on ambiguous_content() while the recipient's mail client shows it.","score":null,"severity":"unknown","published":"2026-10-28T17:31:52.187Z","modified":"2026-10-28T17:31:52.187Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"","name":"MIME-tools","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"5.521","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:cpan/MIME-tools","cpes":[],"source":"CPANSec","url":"https://www.cve.org/CVERecord?id=CVE-2026-116264"}],"remediation":[{"text":"Upgrade to MIME-tools 5.521 or later.","source":"CPANSec","url":"https://www.cve.org/CVERecord?id=CVE-2026-116264"}],"references":["https://metacpan.org/release/DSKOLL/MIME-tools-5.521/changes"],"sources":[{"name":"CVE","id":"CVE-2026-116264","modified":"2026-10-28T17:31:52.187Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-116264"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-29T14:34:58.783Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:10:30.844Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-28T18:15:40.124Z","attemptedAt":"2026-10-28T18:15:40.124Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-28T18:15:40.126Z","attemptedAt":"2026-10-28T18:15:40.126Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-28T18:15:40.758Z","attemptedAt":"2026-10-28T18:15:40.758Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-28T18:15:40.118Z","attemptedAt":"2026-10-28T18:15:40.118Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-112293","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112293","modified":"Oct 28, 2026, 5:31:52 PM","checkedAt":"2026-10-28T18:15:40.758Z"}],"aiSummary":{"text":"MIME::Field::ParamVal versions before 5.521 for Perl may hide parameters after an invalid Content-Type parameter, including the multipart boundary. A remote sender can exploit this to hide an attachment from filters. Parameter parsing stops at the first unreadable parameter name.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T08:47:28.141Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-116264"}]}}