PT-2026-41123 · Pypi · Python-Utcp

Zeroxjacks · Published 2026-05-14 · Updated 2026-05-16 · CVE-2026-45369

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions python-utcp versions prior to 1.1.3

Description The substitute utcp args method in cli communication protocol.py inserts user-controlled tool args values directly into shell command strings without sanitization or escaping. These commands are executed via /bin/bash -c on Unix or powershell.exe -Command on Windows, allowing an unauthenticated attacker to inject shell metacharacters such as ;, |, &, backticks, and $() to achieve remote code execution on the host system.

Recommendations Update to version 1.1.3 or newer. As a temporary workaround, refuse all attacker-controlled tool args.

Exploit

Fix

RCE

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-45369

GHSA-33P6-5JXP-P3X4

Affected Products

Python-Utcp

References · 10

• 🔥 https://github.com/universal-tool-calling-protocol/python-utcp/security/advisories/GHSA-33p6-5jxp-p3x4 · Exploit
• https://osv.dev/vulnerability/GHSA-33p6-5jxp-p3x4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45369 · Security Note
• https://github.com/universal-tool-calling-protocol/python-utcp · Note
• https://twitter.com/UpwindMDR/status/2055050273244971213 · Twitter Post
• https://t.me/cveNotify/163603 · Telegram Post
• https://twitter.com/CVEnew/status/2055074234058113180 · Twitter Post
• https://t.me/CVEtracker/53845 · Telegram Post
• https://t.me/cveNotify/163711 · Telegram Post
• https://t.me/CVEtracker/53844 · Telegram Post