CVE-2026-105841
lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode
Uwe Ohse lrzsz
CVSS
7.7HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.95%Chance of exploitation activity in the next 30 days, higher than 60% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 0.13.0lrzszCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
lrzsz before 0.13.0 contains an OS command injection vulnerability in the lrz receive utility's pipe mode that allows remote senders to execute commands by supplying crafted filenames. When lrz runs under a suffixed name such as lrztar, procheader() in src/lrz.c passes the unescaped ZMODEM/YMODEM filename to popen(), so shell metacharacters execute as the receiving user.
Text from CVE List
Affected versions 1
- lrzszaffected: all versions before 0.13.0CVE List