UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh (CVE-2026-41451) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-41451

UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh

Answer in brief

CVE-2026-41451 records a Unknown severity vulnerability in UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh. The current sources do not mark it as known exploited. The current feed maps tclahr/uac (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Aug 21, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps tclahr/uac (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
tclahr/uacgeneric	>=0 <3.3.0	3.3.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for tclahr/uac.
Review the reported fix. Update tclahr/uac to 3.3.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.