Skip to content
Fencer Intel
high 7.5

CVE-2026-105841 json

lrzsz before 0.13.0 OS Command Injection via lrz Pipe Mode

published last mo. modified last mo. also EUVD-2026-93393

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

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.

Patch / fix

  • Uwe Ohse lrzsz 0.13.0
  • lrzsz Debian 14 0.13.1-1

debian advisories DEBIAN-CVE-2026-105841

  • lrzsz RHEL 8 0.12.20-46.el8_10

red hat advisories RHSA-2026:83525

  • lrzsz AlmaLinux 9 0.12.20-58.el9_8
  • lrzsz AlmaLinux 10 0.12.20-69.el10_2
  • lrzsz AlmaLinux 8 0.12.20-46.el8_10

almalinux advisories ALSA-2026:89755ALSA-2026:86056ALSA-2026:83525

  • lrzsz Rocky Linux 9 0.12.20-58.el9_8
  • lrzsz Rocky Linux 10 0.12.20-69.el10_2
  • lrzsz Rocky Linux 8 0.12.20-46.el8_10

rocky linux advisories RLSA-2026:89755RLSA-2026:86056RLSA-2026:83525

Is CVE-2026-105841 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-105841 updated cvss 7.5

lrzsz: lrzsz: Arbitrary command execution via crafted file names in pipe mode

  • Red Hat Enterprise Linux 7 lrzsz 0.12.20-27.1.el6
    affected: workaround, no fix available
  • Red Hat Enterprise Linux BaseOS (v. 8) lrzsz 0.12.20-46.el8_10
    fixed: vendor fix RHSA-2026:83525
  • Red Hat Enterprise Linux BaseOS (v. 9) lrzsz 0.12.20-58.el9_8
    fixed: vendor fix RHSA-2026:89755
  • Red Hat Enterprise Linux BaseOS (v. 10) lrzsz 0.12.20-69.el10_2
    fixed: vendor fix RHSA-2026:86056
  • Red Hat Enterprise Linux 6 lrzsz 0.12.20-27.1.el6
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last mo.

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 7.7 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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 7.7 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Uwe Ohse lrzsz

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.