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CVE-2026-45370— python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

CVSS 7.7 · High EPSS 0.03% · P10

Affected Version Matrix 1

VendorProductVersion RangeStatus
universal-tool-calling-protocolpython-utcp< 1.1.2affected
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I. Basic Information for CVE-2026-45370

Vulnerability Information
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Vulnerability Title
python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_protocol.py passes a full copy of os.environ to every CLI subprocess. When combined with CVE-2026-45369, an attacker can exfiltrate all process-level secrets in a single tool call. This vulnerability is fixed in 1.1.3.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过环境变量导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Universal Tool Calling Protocol 安全漏洞
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之前版本存在安全漏洞，该漏洞源于_prepare_environment方法传递完整环境变量给子进程，可能导致秘密泄露。
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

VendorProductAffected VersionsCPESubscribe
universal-tool-calling-protocolpython-utcp < 1.1.2 -

II. Public POCs for CVE-2026-45370

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III. Intelligence Information for CVE-2026-45370

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Vendor Advisories for CVE-2026-45370 (1)

Same Patch Batch · universal-tool-calling-protocol · 2026-05-14 · 3 CVEs total

CVE-2026-453698.3 HIGHpython-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication
CVE-2026-446614.7 MEDIUMpython-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication pro

IV. Related Vulnerabilities

Same product: python-utcp
Same vendor: universal-tool-calling-protocol
Same weakness: CWE-526

V. Comments for CVE-2026-45370

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