CVE-2026-105841

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductUwe Ohse Lrzsz

PublishedOct 6, 2026

First seenOct 6, 2026

Weakness typeCWE-78OS command injection

How to fix

Update

Uwe Ohse lrzsz0.13.0 or later

Vendor advisories

ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html

Affected products

Product	Affected versions	Fixed in
Uwe Ohse lrzsz	v < 0.13.0	0.13.0

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