CVE-2026-45369: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in universal-tool-calling-protocol python-utcp
CVE-2026-45369 is an OS command injection vulnerability in the python-utcp package prior to version 1.1.3. The vulnerability arises because the _substitute_utcp_args method inserts user-controlled input directly into shell command strings without sanitization, which are then executed by the system shell. This allows an attacker to inject arbitrary commands. The vulnerability has a high severity with a CVSS score of 8.3. A fix is available in version 1.1.3.
AI Analysis
Technical Summary
The python-utcp package versions before 1.1.3 contain an OS command injection vulnerability (CWE-78) in the _substitute_utcp_args method within cli_communication_protocol.py. This method directly inserts user-supplied tool_args into shell command strings executed via /bin/bash -c on Unix or powershell.exe -Command on Windows without any sanitization or escaping. This flaw enables attackers to execute arbitrary shell commands. The issue is resolved in version 1.1.3 of python-utcp.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary shell commands on the affected system with the privileges of the user running the python-utcp process. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts. The CVSS 3.1 base score is 8.3, indicating a high severity vulnerability with network attack vector, high impact on confidentiality, integrity, and availability, and requiring user interaction and high attack complexity.
Mitigation Recommendations
Upgrade python-utcp to version 1.1.3 or later, where the vulnerability is fixed. Since the vulnerability is resolved in this version, applying this update is the recommended remediation. Patch status is not explicitly stated in the vendor advisory, but the description confirms the fix in 1.1.3. No additional mitigations are specified.
CVE-2026-45369: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in universal-tool-calling-protocol python-utcp
Description
CVE-2026-45369 is an OS command injection vulnerability in the python-utcp package prior to version 1.1.3. The vulnerability arises because the _substitute_utcp_args method inserts user-controlled input directly into shell command strings without sanitization, which are then executed by the system shell. This allows an attacker to inject arbitrary commands. The vulnerability has a high severity with a CVSS score of 8.3. A fix is available in version 1.1.3.
CVSS v3.1
Score 8.3high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The python-utcp package versions before 1.1.3 contain an OS command injection vulnerability (CWE-78) in the _substitute_utcp_args method within cli_communication_protocol.py. This method directly inserts user-supplied tool_args into shell command strings executed via /bin/bash -c on Unix or powershell.exe -Command on Windows without any sanitization or escaping. This flaw enables attackers to execute arbitrary shell commands. The issue is resolved in version 1.1.3 of python-utcp.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary shell commands on the affected system with the privileges of the user running the python-utcp process. This can lead to complete system compromise, including confidentiality, integrity, and availability impacts. The CVSS 3.1 base score is 8.3, indicating a high severity vulnerability with network attack vector, high impact on confidentiality, integrity, and availability, and requiring user interaction and high attack complexity.
Mitigation Recommendations
Upgrade python-utcp to version 1.1.3 or later, where the vulnerability is fixed. Since the vulnerability is resolved in this version, applying this update is the recommended remediation. Patch status is not explicitly stated in the vendor advisory, but the description confirms the fix in 1.1.3. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-12T00:51:29.085Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0635daec166c07b010dd36
Added to database: 5/14/2026, 8:51:38 PM
Last enriched: 5/22/2026, 3:32:58 PM
Last updated: 6/16/2026, 12:26:48 AM
Views: 74
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