Quick answers
- Is CVE-2026-105841 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-105841 being exploited in the wild.
- How severe is CVE-2026-105841?
- High severity, with a CVSS score of 7.5, published 6 October 2026.
- Which products and versions are affected?
- Uwe Ohse Lrzsz before 0.13.0.
- Is there a fix for CVE-2026-105841?
- Yes: fixed in 0.13.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-105841 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-105841?
- Check whether you run Uwe Ohse Lrzsz at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 0.13.0
Technical details
A command injection vulnerability exists in the procheader() function in src/lrz.c when lrz is invoked with a suffixed name (such as lrztar). The function passes unescaped ZMODEM/YMODEM filenames received from the remote sender directly to popen(), allowing shell metacharacters in the filename to be interpreted and executed. An attacker capable of controlling the filename during a file transfer can achieve remote code execution as the user running lrz.
Affected products
- Uwe Ohse lrzsz before 0.13.0
Timeline
- 2026-10-06: disclosed