GitHub Advisoryadvisory · PyPI

GHSA-75mj-4g74-9rg2 Universal Tool Calling Protocol (UTCP) client library for Python vulnerable to Trust Boundary Violation through Manual JSON specification

HIGH Published 2025-12-13 Modified 2025-12-15 Official page ↗
Aliases
CVE-2025-14542
Ecosystem
PyPI
Packages
utcp
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-501
Reviewed
2025-12-15

Affected packages

• PyPI utcp: < 1.1.0 → fixed in 1.1.0

Description

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 exploit the client.

Related

Alias · CVE (1)

  • CVE-2025-14542 The vulnerability arises when a client fetches a tools’ JSON specification, known as a Manual, from a remote Manual Endpoint. vulnerability

Weakness · CWE (1)

  • CWE-501 Trust Boundary Violation weakness

References