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CVE-2026-41451— UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh

Quick assessment

Affected
tclahr uac
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UAC（Unix 类系统工件收集器）3.3.0 之前的版本在 parse_artifact.sh 文件中存在命令注入漏洞。该漏洞源于用户替换逻辑未对用户名字段和 /etc/passwd 中的主目录路径进行转义处理，便直接将其嵌入到命令字符串中，并通过 eval 执行。攻击者可通过构造恶意的用户名或 /etc/passwd 条目中的主目录路径，注入 Shell 元字符（如命令替换语法或分号等），从而在分析师的主机上执行任意命令。

CVSS 7.8 · High EPSS 0.72% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
tclahr uac < 3.3.0 affected
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I. Basic Information for CVE-2026-41451

Vulnerability Information
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Vulnerability Title
UAC < 3.3.0 Command Injection via User Substitution in parse_artifact.sh
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
tclahr uac 0 ~ 3.3.0 -

II. Public POCs for CVE-2026-41451

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7141 chars
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III. Intelligence Information for CVE-2026-41451

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Patches & Fixes for CVE-2026-41451 (1)

Vendor Advisories for CVE-2026-41451 (1)

Same Patch Batch · tclahr · 2026-08-21 · 3 CVEs total

CVE-2026-41449 7.8 HIGH UAC < 3.3.0 Command Injection via run_command.sh
CVE-2026-41450 7.8 HIGH UAC < 3.3.0 Command Injection via command_collector.sh

IV. Related Vulnerabilities

Same product: uac
Same vendor: tclahr
Same weakness: CWE-78

V. Comments for CVE-2026-41451

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