VDB-364004 · CVE-2026-45370 · GHSA-5v57-8rxj-3p2r

universal-tool-calling-protocol python-utcp up to 1.1.1 cli_communication_protocol.py _prepare_environment exposure of sensitive information through environmental variables

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in universal-tool-calling-protocol python-utcp up to 1.1.1 and classified as problematic. This vulnerability affects the function _prepare_environment of the file cli_communication_protocol.py. Such manipulation leads to exposure of sensitive information through environmental variables. This vulnerability is traded as CVE-2026-45370. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in universal-tool-calling-protocol python-utcp up to 1.1.1. It has been rated as problematic. Affected by this issue is the function _prepare_environment of the file cli_communication_protocol.py. The manipulation with an unknown input leads to a exposure of sensitive information through environmental variables vulnerability. Using CWE to declare the problem leads to CWE-526. The product uses an environment variable to store unencrypted sensitive information. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-45370 since 05/12/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.002.

Upgrading to version 1.1.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30477). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Programming Language Software

Vendor

universal-tool-calling-protocol

Name

python-utcp

Version

Website

Product: https://github.com/universal-tool-calling-protocol/python-utcp/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.7
CNA Vector (GitHub_M): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Exposure of sensitive information through environmental variables
CWE: CWE-526 / CWE-200 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: python-utcp 1.1.2

Timelineinfo

05/12/2026 CVE reserved
05/15/2026 +3 days Advisory disclosed
05/15/2026 +0 days VulDB entry created
05/15/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5v57-8rxj-3p2r
Status: Confirmed

CVE: CVE-2026-45370 (🔒)
GCVE (CVE): GCVE-0-2026-45370
GCVE (VulDB): GCVE-100-364004
EUVD: 🔒

Entryinfo

Created: 05/15/2026 04:18
Updated: 05/15/2026 15:54
Changes: 05/15/2026 04:18 (66), 05/15/2026 15:54 (1)
Complete: 🔍
Cache ID: 216::103