CVE-2026-45370

python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

Published May 14, 2026 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-5v57-8rxj-3p2r python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
History
Type Values Removed Values Added
First Time appeared Universal-tool-calling-protocol
Universal-tool-calling-protocol python-utcp
Vendors & Products Universal-tool-calling-protocol
Universal-tool-calling-protocol python-utcp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
Weaknesses CWE-526
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 15, 2026, 11:23 AM
Reserved
May 12, 2026, 12:51 AM
Status
Deferred
Published
May 14, 2026, 9:16 PM
Modified
Oct 26, 2026, 2:10 PM