CVE-2026-111091
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Code Execution in JetBrains Junie CLI via Untrusted MCP Server

Publication date: 2026-10-15

Last updated on: 2026-10-15

Assigner: JetBrains s.r.o.

Description
In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

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Meta Information

Published
2026-10-15
Last Modified
2026-10-15
Generated
2026-10-15
AI Q&A
2026-10-15
EPSS Evaluated
N/A
NVD
CVE-2026-111091
EUVD
EUVD-2026-102144

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
JetBrains Junie CLI 0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-829 The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

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Executive Summary

This vulnerability in JetBrains Junie CLI before version 26.8.3 allows code execution through an untrusted project's MCP server configuration. This means an attacker could potentially run malicious code on a system running the vulnerable version by exploiting misconfigured or malicious MCP server settings.

Impact Analysis

If you use JetBrains Junie CLI before 26.8.3, an attacker could execute arbitrary code on your system. This could lead to data theft, system compromise, or further network infiltration. Users should update to version 26.8.3 or later to mitigate this risk.

Mitigation Strategies

Update JetBrains Junie CLI to version 26.8.3 or later to address the code execution vulnerability via untrusted project MCP server configuration.

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