CVE-2026-45370 HIGH

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

Vendor Universal-Tool-Calling-Protocol

Product python-utcp

Weakness CWE-526

Published May 14, 2026

Last update May 15, 2026

View on NVD All CVEs

CVSS base score

7.7/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality High

Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

What the vulnerability does

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.

Key dates

Disclosure timeline

May 14, 2026 CVE published

May 15, 2026 Record updated