python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or escaping. These commands are then executed via /bin/bash -c (Unix) or powershell.exe -Command (Windows), allowing an attacker to inject arbitrary shell commands. This vulnerability is fixed in 1.1.3.
History

Sun, 17 May 2026 18:00:00 +0000

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

Sat, 16 May 2026 01:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 14 May 2026 20:45:00 +0000

Type Values Removed Values Added
Description python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or escaping. These commands are then executed via /bin/bash -c (Unix) or powershell.exe -Command (Windows), allowing an attacker to inject arbitrary shell commands. This vulnerability is fixed in 1.1.3.
Title python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol
Weaknesses CWE-78
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-05-14T20:14:50.993Z

Updated: 2026-05-16T01:00:25.585Z

Reserved: 2026-05-12T00:51:29.085Z

Link: CVE-2026-45369

cve-icon Vulnrichment

Updated: 2026-05-16T01:00:20.385Z

cve-icon NVD

Status : Deferred

Published: 2026-05-14T21:16:48.220

Modified: 2026-05-16T01:16:17.233

Link: CVE-2026-45369

cve-icon Redhat

No data.