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.

CVSS 4.0

7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-25)

CWE

CWE-78

Published

2026-10-06

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

References

• https://ohse.de/uwe/software/lrzsz.html
• https://ohse.de/uwe/software/lrzsz/NEWS-0.13.0.html
• https://www.vulncheck.com/advisories/lrzsz-before-0.13.0-os-command-injection-via-lrz-pipe-mode

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