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    CVE-2026-101060

    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.

    Published:Sep 27, 2026
    Last Modified:Sep 28, 2026
    EPS:Sep 27, 2026
    EPSS Score:0.00182
    CVSS Score:8.2

    Affected Products

    Vendor
    Universal-tool-calling-protocol
    Product
    Python-utcp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-918 Server-Side Request Forgery

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

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    CVE-2026-12210 (CVSS 2.1) — A vulnerability was detected in universal-tool-calling-protocol python-utcp 1.1.0. This affects an unknown fun…
    CVE-2026-45369 (CVSS 8.3) — python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_comm…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High