HIGH7.5
PYSEC-2026-2000
Universal Tool Calling Protocol (UTCP) client library for Python vulnerable to Trust Boundary Violation through Manual JSON specification
Quick fix
PYSEC-2026-2000 — utcp: upgrade to the fixed version with the command below.
pip install --upgrade 'utcp>=1.1.0'Details
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-14542[ADVISORY]
- https://github.com/universal-tool-calling-protocol/python-utcp/commit/2dc9c02df72cad3770c934959325ec344b441444[WEB]
- https://github.com/universal-tool-calling-protocol/python-utcp[WEB]
- https://research.jfrog.com/vulnerabilities/python-utcp-untrusted-manual-command-execution-jfsa-2025-001648329[WEB]
- https://pypi.org/project/utcp[PACKAGE]
- https://github.com/advisories/GHSA-75mj-4g74-9rg2[ADVISORY]