---
id: CVE-2026-105840
title: >-
  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
summary: >-
  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
  s…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-22
vendor: Uwe Ohse
product: lrzsz
affected:
  - lrzsz < 0.13.0
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:25:00.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105840'
references:
  - url: 'https://ohse.de/uwe/software/lrzsz.html'
    label: disclosure@vulncheck.com
  - url: 'https://ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lrzsz-before-0.13.0-path-traversal-via-lrz-restricted-mode-checkpath
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T14:00:19.149Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.