CVE-2026-105840

High

Description

lrzsz before 0.13.0 contains a path traversal vulnerability in the lrz receive utility's restricted mode that allows malicious ZMODEM senders to write files outside the current directory using absolute pathnames. Because checkpath() in src/lrz.c only rejects '../' sequences unless built with --enable-pubdir, attackers can send files named with absolute paths to overwrite any file writable by the receiving user.

SeverityHigh

CVSS7.5

Exploit probability—

ProductUwe Ohse Lrzsz

PublishedOct 6, 2026

First seenOct 6, 2026

Weakness typeCWE-22Path traversal

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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