{"api_version":"1","generated_at":"2026-10-29T06:15:21+00:00","cve":"CVE-2026-116270","urls":{"html":"https://cve.report/CVE-2026-116270","api":"https://cve.report/api/cve/CVE-2026-116270.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-116270","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116270"},"summary":{"title":"MIME::Words versions before 5.521 for Perl allow memory exhaustion via repeated \"=?\" sequences in decode_mimewords","description":"MIME::Words versions before 5.521 for Perl allow memory exhaustion via repeated \"=?\" sequences in decode_mimewords.\n\nFor each \"=?\" that does not start a complete encoded word, decode_mimewords appends an error message containing the whole input string to $@. A boundary of 8,000 \"=?\" pairs (16,000 bytes) adds 8,000 copies of itself to $@, about 128 MB.\n\nFrom version 5.518, MIME::Parser decodes every multipart boundary this way, so a remote sender can exhaust the memory of the parsing process with one Content-Type header.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-10-28 18:17:13","updated_at":"2026-10-28 18:17:13"},"problem_types":["CWE-407","CWE-407 CWE-407 Inefficient Algorithmic Complexity"],"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-2026-116270","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116270","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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["MIME::Words"],"packageName":"MIME-tools","packageURL":"pkg:cpan/MIME-tools","programFiles":["lib/MIME/Words.pm","lib/MIME/Head.pm"],"programRoutines":[{"name":"MIME::Words::decode_mimewords"},{"name":"MIME::Head::multipart_boundary"}],"repo":"https://salsa.debian.org/dskoll/mime-tools","versions":[{"lessThan":"5.521","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"MIME::Words versions before 5.521 for Perl allow memory exhaustion via repeated \"=?\" sequences in decode_mimewords.\n\nFor each \"=?\" that does not start a complete encoded word, decode_mimewords appends an error message containing the whole input string to $@. A boundary of 8,000 \"=?\" pairs (16,000 bytes) adds 8,000 copies of itself to $@, about 128 MB.\n\nFrom version 5.518, MIME::Parser decodes every multipart boundary this way, so a remote sender can exhaust the memory of the parsing process with one Content-Type header."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-28T17:33:48.187Z","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::Words versions before 5.521 for Perl allow memory exhaustion via repeated \"=?\" sequences in decode_mimewords","x_generator":{"engine":"cpansec-cna-tool 0.1"}}},"cveMetadata":{"assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","assignerShortName":"CPANSec","cveId":"CVE-2026-116270","datePublished":"2026-10-28T17:33:48.187Z","dateReserved":"2026-10-25T18:05:02.236Z","dateUpdated":"2026-10-28T17:33:48.187Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 18:17:13","lastModifiedDate":"2026-10-28 18:17:13","problem_types":["CWE-407","CWE-407 CWE-407 Inefficient Algorithmic Complexity"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"116270","Ordinal":"1","Title":"MIME::Words versions before 5.521 for Perl allow memory exhausti","CVE":"CVE-2026-116270","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"116270","Ordinal":"1","NoteData":"MIME::Words versions before 5.521 for Perl allow memory exhaustion via repeated \"=?\" sequences in decode_mimewords.\n\nFor each \"=?\" that does not start a complete encoded word, decode_mimewords appends an error message containing the whole input string to $@. A boundary of 8,000 \"=?\" pairs (16,000 bytes) adds 8,000 copies of itself to $@, about 128 MB.\n\nFrom version 5.518, MIME::Parser decodes every multipart boundary this way, so a remote sender can exhaust the memory of the parsing process with one Content-Type header.","Type":"Description","Title":"MIME::Words versions before 5.521 for Perl allow memory exhausti"}]}}}