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Vulnerability record · CVE-2026-41451 · published 21 August 2026

CVE-2026-41451: OS command injection vulnerability

UAC (Unix-like Artifacts Collector) versions prior to 3.3.0 contain a command injection vulnerability in the user substitution logic within parse_artifact.sh where usernames and home directories from /etc/passwd are substituted directly into command strings without escaping before execution via eval. Attackers can inject shell metacharacters such as command substitution syntax or semicolons through crafted usernames or home directory paths in /etc/passwd entries to execute arbitrary commands on the analyst's host system.

8.5 CVSS 4.0 High EPSS 1.2% · top 33.9% CWE-78 · OS command injection Deferred
8.5CVSS 4.0 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

Description

UAC (Unix-like Artifacts Collector) versions prior to 3.3.0 contain a command injection vulnerability in the user substitution logic within parse_artifact.sh where usernames and home directories from /etc/passwd are substituted directly into command strings without escaping before execution via eval. Attackers can inject shell metacharacters such as command substitution syntax or semicolons through crafted usernames or home directory paths in /etc/passwd entries to execute arbitrary commands on the analyst's host system.

CVSS:4.0/AV:L/AC:L/AT:N/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:

References

LinkTags
https://github.com/tclahr/uac/commit/2cc367d8ead388f05abd3cfb8af537788a124e72
https://github.com/tclahr/uac/pull/443
https://www.vulncheck.com/advisories/uac-command-injection-via-user-substitution-in-parse-artifact-sh

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Source: NIST National Vulnerability Database (record CVE-2026-41451), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.