CVE-2026-101060
High
Description
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductUniversal-tool-calling-protocol Python-utcp
PublishedSep 27, 2026
First seenSep 27, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- universal-tool-calling-protocol python-utcp1.1.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| universal-tool-calling-protocol python-utcp | v < 1.1.4 | 1.1.4 |
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