CVE-2026-93576 | BDVDB-2026-376997 Detail

Description#

A flaw was found in Netty netty-codec-smtp. The component does not properly validate Carriage Return (CR) and Line Feed (LF) characters in the SMTP command-name field. A remote attacker, if an application routes untrusted input into this field, can embed CR/LF characters to inject arbitrary SMTP commands. This can lead to SMTP command smuggling, allowing for unauthorized email relay or spoofing of sender/recipient addresses. While the impact is significant, the real-world exploitability is considered lower as applications typically do not place user-controlled data in the command-name field.

Impact#

Weaknesses#

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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.