Vulnerability · Published Sep 21, 2026 · Assigned by CPANSec
CVE-2026-93012Email::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
Critical 9.8
In plain English
A critical-severity OS command injection in Email-Sender. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | libemail-sender-perl | no fix listed | UBUNTU-CVE-2026-93012 |
| Ubuntu:24.04:LTS | libemail-sender-perl | no fix listed | UBUNTU-CVE-2026-93012 |
| Ubuntu:26.04:LTS | libemail-sender-perl | no fix listed | UBUNTU-CVE-2026-93012 |
| Ubuntu:26.10 | libemail-sender-perl | no fix listed | UBUNTU-CVE-2026-93012 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Email-Sender | 0 – before 2.602 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H