CVE-2026-45370
HIGHpython-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection
Title source: cnaDescription
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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-5v57-8rxj-3p2r
Scores
CVSS v3
7.7
EPSS
0.0003
EPSS Percentile
10.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-526
Status
published
Products (2)
pypi/utcp-cli
0 - 1.1.2PyPI
universal-tool-calling-protocol/python-utcp
< 1.1.2
Published
May 14, 2026
Tracked Since
May 15, 2026