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CVE-2026-105841— lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode

Quick assessment

Affected
Uwe Ohse lrzsz
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 lrzsz 0.13.0 之前的版本中，lrz 的接收工具在管道模式下存在操作系统命令注入漏洞。远程发送者可以通过提供精心构造的文件名来执行命令。当 lrz 以下列后缀名称运行时（例如 lrztar），src/lrz.c 中的 procheader() 函数会将未经转义的 ZMODEM/YMODEM 文件名传递给 popen()，导致 shell 元字符以接收用户的身份执行。

CVSS 7.5 · High
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I. Basic Information for CVE-2026-105841

Vulnerability Information
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Vulnerability Title
lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Uwe Ohse lrzsz 0 ~ 0.13.0 -

II. Public POCs for CVE-2026-105841

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III. Intelligence Information for CVE-2026-105841

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Other References for CVE-2026-105841 (3)

Same Patch Batch · Uwe Ohse · 2026-10-06 · 3 CVEs total

CVE-2026-105840 7.5 HIGH lrzsz before 0.13.0 Path Traversal via lrz Restricted Mode checkpath()
CVE-2026-105842 6.4 MEDIUM lrzsz before 0.13.0 Heap Buffer Overflow via lrz procheader() Pathname

IV. Related Vulnerabilities

Same product: lrzsz
Same vendor: Uwe Ohse
Same weakness: CWE-78

V. Comments for CVE-2026-105841

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