CVE-2026-93563 | BDVDB-2026-376986 Detail

Description#

A flaw was found in Netty's `SmtpResponseDecoder` component. A remote attacker, acting as a malicious or man-in-the-middle (MITM) SMTP server, could exploit this by sending a specially crafted, unbounded multi-line SMTP response without a terminator. This vulnerability leads to unbounded memory accumulation within the client's Java Virtual Machine (JVM) heap, causing an `OutOfMemoryError` and a denial of service (DoS) due to a process crash.

Impact#

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Exploit#

History#

1. Version 12026-09-18Record published in the CVE List.
2. Version 22026-09-25Most recent update recorded in the CVE List.