CVE-2026-93012 Email::Sender::Transport::Sendmail versions before 2.602 for Perl allow arbitrary command execution on Windows sending a message whose envel
Attackers can execute arbitrary commands on Windows by injecting shell metacharacters into email envelope addresses processed by the Sendmail transport.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93012?
CVE-2026-93012 is a critical command injection vulnerability, published on 21 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Email::Sender::Transport::Sendmail versions before 2.602 for Perl allow arbitrary command execution on Windows sending a message whose envelope address reaches the shell in _sendmail_pipe.
On MSWin32 the envelope sender and every recipient go into a single command string, which open() passes to a shell. Every other platform gets the list form, which runs sendmail directly. When the caller supplies no envelope, Email::Sender::Simple takes the recipients from the To and Cc headers and the sender from the From header.
An attacker who controls one of those header addresses runs commands as the sending process.
Weakness: CWE-78
Which versions are affected by CVE-2026-93012?
How do I fix CVE-2026-93012?
No fix has been published for CVE-2026-93012 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-93012 being exploited?
There is no known exploitation of CVE-2026-93012 in the wild and no public exploit code.
Sources
Also known as GHSA-j6jw-3jf9-6hc7, UBUNTU-CVE-2026-93012.