Vulnerability · Published Aug 21, 2026 · Assigned by VulnCheck

CVE-2026-41451UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh

High 7.8

In plain English

A high-severity OS command injection in uac from tclahr. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)1.2%top 32.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
tclahr	uac	0 – before 3.3.0

Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Pull Request issue-tracking
Patch Commit patch
https://www.vulncheck.com/advisories/uac-command-injection-via-user-substitution-in-parse-artifact-sh third-party-advisory