CVE-2026-41451 UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh
Attackers can execute arbitrary commands on the analyst's host by injecting shell metacharacters into /etc/passwd entries processed by UAC.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-41451?
CVE-2026-41451 is a high-severity command injection vulnerability in tclahr uac, published on 21 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-41451?
How do I fix CVE-2026-41451?
No fix has been published for CVE-2026-41451 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-41451 being exploited?
There is no known exploitation of CVE-2026-41451 in the wild and no public exploit code.
Sources
Also known as GHSA-3v7p-hjjf-gqp8.