High severity7.5OSV Advisory· Published Dec 13, 2025· Updated Apr 15, 2026
CVE-2025-14542
CVE-2025-14542
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
utcpPyPI | < 1.1.0 | 1.1.0 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-75mj-4g74-9rg2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-14542ghsaADVISORY
- github.com/universal-tool-calling-protocol/python-utcp/commit/2dc9c02df72cad3770c934959325ec344b441444nvdWEB
- research.jfrog.com/vulnerabilities/python-utcp-untrusted-manual-command-execution-jfsa-2025-001648329ghsaWEB
- research.jfrog.com/vulnerabilities/python-utcp-untrusted-manual-command-execution-jfsa-2025-001648329/nvd
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