CVE-2026-101060: Universal-Tool-Calling-Protocol Python-Utcp

High severity, CVSS 8.2. EPSS: 0.2% chance of exploitation in the next 30 days.

python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.

Affected products

• Universal-Tool-Calling-Protocol Python-Utcp: before 1.1.4 (fixed in 1.1.4)

Published 2026-09-27. Last modified 2026-09-30.