CVE-2026-101060: python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-27 · updated 2026-09-30
Weakness: CWE-918

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.

Affected products

universal-tool-calling-protocol python-utcp: before 1.1.4 — fixed in 1.1.4

How to fix

Upgrade to a fixed version: universal-tool-calling-protocol python-utcp 1.1.4. Check the vendor advisory for mitigations.

References

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