High 7.7Published May 14, 2026

CVE-2026-45370python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

Updated under an hour ago (Oct 26, 2026, 11:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for universal-tool-calling-protocol python-utcp

Exploited in the last 30 days

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.

CVSS: 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Weakness (CWE): CWE-526
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

universal-tool-calling-protocol python-utcp universal_tool_calling_protocol:python_utcp (from the name)	before 1.1.2	CNA record

References

References

https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r	x-refsource-confirm

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.