# CVE-2026-45370

## Summary

- **CVE ID:** CVE-2026-45370
- **Severity:** HIGH
- **CVSS Score:** 7.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)
- **CWE:** CWE-526
- **Published:** May 14, 2026
- **Last Modified:** May 15, 2026

## Description

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.

## Affected Products

- universal-tool-calling-protocol — python-utcp (< 1.1.2)

## References

- [CNA](https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.22%
- **EPSS Percentile:** 12.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._