CVE-2026-40032
UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
5th
UAC (Unix-like Artifacts Collector) before 3.3.0-rc1 contains a command injection vulnerability in the placeholder substitution and command execution pipeline where the _run_command() function passes constructed command strings directly to eval without proper sanitization. Attackers can inject shell metacharacters or command substitutions through attacker-controlled inputs including %line% values from foreach iterators and %user% / %user_home% values derived from system files to achieve arbitrary command execution with the privileges of the UAC process.
| CWE | CWE-78 |
| Vendor | tclahr |
| Product | uac |
| Published | Apr 8, 2026 |
| Last Updated | Apr 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
tclahr / UAC
0 ≤ 3.2.0
References
github.com: https://github.com/tclahr/uac/pull/443 github.com: https://github.com/tclahr/uac/commit/cb95d7166cd47908e1189d9669e43f9a6d3d707f github.com: https://github.com/tclahr/uac/commit/50ace60e172e38feb78347bdf579311c23eff078 github.com: https://github.com/tclahr/uac/commit/d0fca5e36d8d6a33a4404f0f6fe92b0424544589 github.com: https://github.com/tclahr/uac/issues/429 mobasi.ai: https://mobasi.ai/sentinel vulncheck.com: https://www.vulncheck.com/advisories/uac-rc1-command-injection-via-placeholder-substitution
Credits
Mobasi Security Team