CVE-2026-45370
python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
0th
python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_protocol.py passes a full copy of os.environ to every CLI subprocess. When combined with CVE-2026-45369, an attacker can exfiltrate all process-level secrets in a single tool call. This vulnerability is fixed in 1.1.3.
| CWE | CWE-526 |
| Vendor | universal-tool-calling-protocol |
| Product | python-utcp |
| Published | May 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
universal-tool-calling-protocol / python-utcp
< 1.1.2