An excessive memory use issue (CWE-770) exists in Email-MIME, before version 1.954, which can cause denial of service when parsing multipart MIME messages. The patch set (from 2020 and 2024) limits excessive depth and the total number of parts.
https://www.cve.org/CVERecord?id=CVE-2024-4140
https://github.com/rjbs/Email-MIME/pull/80
https://github.com/rjbs/Email-MIME/issues/66
https://github.com/rjbs/Email-MIME/commit/fc0fededd24a71ccc51bcd8b1e486385d09aae63
https://github.com/rjbs/Email-MIME/commit/b2cb62f19e12580dd235f79e2546d44a6bec54d1
https://github.com/rjbs/Email-MIME/commit/7e96ecfa1da44914a407f82ae98ba817bba08f2d
https://github.com/rjbs/Email-MIME/commit/3dcf096eeccb8e4dd42738de676c8f4a5aa7a531
https://github.com/rjbs/Email-MIME/commit/3a12edd119e493156a5a05e45dd50f4e36b702e8
https://github.com/rjbs/Email-MIME/commit/02bf3e26812c8f38a86a33c168571f9783365df2