CVE-2026-105841
CVE-2026-105841
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html (vendor-advisory)
- ohse.de/uwe/software/lrzsz.html (product)
- www.vulncheck.com/advisories/lrzsz-before-0.13.0-os-command-injection-via-lrz-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105841?
- CVE-2026-105841 is a high-severity vulnerability, classified under OS Command Injection. CVSS score: 7.5/10. Published 2026-10-06.
- How severe is CVE-2026-105841?
- High severity. CVSS v3 base score is 7.5 out of 10.