MinorCritical vulnerability

CVE-2026-105841 (CVSS 7.7)

NVD · officialPublished Oct 6, 2026Risk 23/100

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.

Technical details

CVSS

7.7

AV:NetworkAC:LowPR:NoneUI:Passive

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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