CyberRota Analysis
AI-GeneratedMailpit versions prior to 1.30.4 are vulnerable to a memory pressure issue due to the lack of enforcement of the RFC 5321 command-line limit, allowing unauthenticated remote SMTP clients to send oversized commands. This can lead to service availability degradation as concurrent oversized inputs may exhaust memory resources. Developers and organizations using Mailpit for email testing should prioritize upgrading to version 1.30.4 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine() using bufio.Reader.ReadString before session.parseLine() parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticated remote SMTP client can send an oversized single command line that is fully allocated before syntax rejection or timeout, and the normal MaxMessageSize and DATA limits do not apply to this pre-DATA path. The same command reader is used by handleAuthLogin(), handleAuthPlain(), and handleAuthCramMD5() continuation lines, so concurrent oversized inputs can create memory pressure and reduce service availability. This issue is fixed in version 1.30.4.