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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 06 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 06 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
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.
Title lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode
First Time appeared Lrzsz Project
Lrzsz Project lrzsz
Weaknesses CWE-78
CPEs cpe:2.3:a:lrzsz_project:lrzsz:*:*:*:*:*:*:*:*
Vendors & Products Lrzsz Project
Lrzsz Project lrzsz
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-06T13:58:44.875Z

Reserved: 2026-10-05T22:00:10.842Z

Link: CVE-2026-105841

cve-icon Vulnrichment

Updated: 2026-10-06T13:58:35.529Z

cve-icon NVD

Status : Deferred

Published: 2026-10-06T14:17:41.460

Modified: 2026-10-06T15:25:00.650

Link: CVE-2026-105841

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T18:45:05Z

Weaknesses