What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-15
• Weakness: CWE-78

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

• tclahr uac: before 3.3.0 — fixed in 3.3.0

How to fix

Upgrade to a fixed version: tclahr uac 3.3.0. Check the vendor advisory for mitigations.

References

• 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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