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TI-2026-30040 Aliases CVE-2026-41451GHSA-3v7p-hjjf-gqp8

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

Priority MEDIUM 41CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01171 67th percentileScored 2026-11-07
Fix Fixed uac (tclahr): 3.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
tclahruacbefore 3.3.03.3.0Patch availableCNA
  • uac Vendortclahr Affected before 3.3.0 Fixed in 3.3.0 Patch available CNA

Remediation

  • Fix · CNA uac (tclahr) Fixed in 3.3.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    tclahr uac 3.3.0

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    • TI-2026-30039 UAC < 3.3.0 Command Injection via command_collector.shPriority MEDIUM 41
    • TI-2026-30038 UAC < 3.3.0 Command Injection via run_command.shPriority MEDIUM 41
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41451
  2. 2026-10-03 Alias added: GHSA-3v7p-hjjf-gqp8

References

Patch 2

  • TI-2026-30039 UAC < 3.3.0 Command Injection via command_collector.sh CVSS 4.0HIGH 8.5
  • TI-2026-30038 UAC < 3.3.0 Command Injection via run_command.sh CVSS 4.0HIGH 8.5
  • TI-2026-28875 UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences