Headline
GHSA-75mj-4g74-9rg2: 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 exploit the client.
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- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-14542
Universal Tool Calling Protocol (UTCP) client library for Python vulnerable to Trust Boundary Violation through Manual JSON specification
High severity GitHub Reviewed Published Dec 13, 2025 to the GitHub Advisory Database • Updated Dec 15, 2025
Affected versions
< 1.1.0
Description
Published to the GitHub Advisory Database
Dec 13, 2025
Last updated
Dec 15, 2025