CVE-2026-40032 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-08 | Published 2026-04-08 | Updated 2026-04-09 | Assigner VulnCheck

HIGH: 8.5CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem types

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (CWE-78)

Product status

Default status

unaffected

Any version

affected

3.3.0-rc1 (semver)

unaffected

Credits

Mobasi Security Team finder

References

github.com/tclahr/uac/pull/443 (Pull Request) product

github.com/...ommit/cb95d7166cd47908e1189d9669e43f9a6d3d707f (Patch Commit #1) patch

github.com/...ommit/50ace60e172e38feb78347bdf579311c23eff078 (Patch Commit #2) patch

github.com/...ommit/d0fca5e36d8d6a33a4404f0f6fe92b0424544589 (Patch Commit #3) patch

github.com/tclahr/uac/issues/429 (Related Issue) product

mobasi.ai/sentinel (Mobasi Sentinel Vulnerability Index) vendor-advisory

www.vulncheck.com/...-injection-via-placeholder-substitution (VulnCheck Advisory: UAC < 3.3.0-rc1 Command Injection via Placeholder Substitution) third-party-advisory

cve.org (CVE-2026-40032)

nvd.nist.gov (CVE-2026-40032)

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