CVE-2026-45369— python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| universal-tool-calling-protocol | python-utcp | < 1.1.2 | affected |
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I. Basic Information for CVE-2026-45369
Vulnerability Information
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Vulnerability Title
python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol
Source: NVD (National Vulnerability Database)
Vulnerability Description
python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or escaping. These commands are then executed via /bin/bash -c (Unix) or powershell.exe -Command (Windows), allowing an attacker to inject arbitrary shell commands. This vulnerability is fixed in 1.1.3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
Universal Tool Calling Protocol 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Universal Tool Calling Protocol是Universal Tool Calling Protocol开源的一个UTCP的官方python实现库。 Universal Tool Calling Protocol 1.1.3之前版本存在操作系统命令注入漏洞，该漏洞源于_substitute_utcp_args方法未清理用户控制的tool_args值，可能导致命令注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| universal-tool-calling-protocol | python-utcp | < 1.1.2 | - |
II. Public POCs for CVE-2026-45369
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · universal-tool-calling-protocol · 2026-05-14 · 3 CVEs total
| CVE-2026-45370 | 7.7 HIGH | python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Comm |
| CVE-2026-44661 | 4.7 MEDIUM | python-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication pro |
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V. Comments for CVE-2026-45369
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