PYSEC-2026-2000 Universal Tool Calling Protocol (UTCP) client library for Python vulnerable to Trust Boundary Violation through Manual JSON specification

The vulnerability arises when a client fetches a tools’ JSON specification, known as a Manual, from a remote Manual Endpoint. While a provider may initially serve a benign manual e.g., one defining an HTTP tool call, earning the clients’ trust, a malicious provider can later change the manual to...

Universal Tool Calling Protocol 安全漏洞

Universal Tool Calling Protocol is an official Python implementation of the UTCP open-source protocol. Versions prior to 1.1.3 of Universal Tool Calling Protocol contained security vulnerabilities; these vulnerabilities stemmed from the prepareenvironment method passing complete environment...

Universal Tool Calling Protocol 操作系统命令注入漏洞

Universal Tool Calling Protocol is an official Python implementation of the UTCP open-source protocol. Versions prior to 1.1.3 of Universal Tool Calling Protocol contained a vulnerability related to operating system command injection. This vulnerability stemmed from the substituteutcpargs method...

Trust Boundary Violation

Overview utcp is an Universal Tool Calling Protocol UTCP client library for Python Affected versions of this package are vulnerable to Trust Boundary Violation. Via the remote Manual Endpoint, the client retrieves a tool’s JSON specification, known as a Manual. An attacker can execute arbitrary...