CVE-2026-45369
python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol
HIGH 8.3EPSS 0.4%
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.
- Affected
- universal-tool-calling-protocol · python-utcp
- CVSS v3.1 GITHUB
- 8.3 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H - CVSS v3.1 GitHub
- 10.0 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.35% chance of exploitation in the next 30 days, 27th percentile
- Published
- 2026-05-14
- Updated
- 2026-05-16