CVE-2026-123838
Received Received - Intake

Code Execution in JetBrains IntelliJ IDEA via UI Designer Form File

Publication date: 2026-11-06

Last updated on: 2026-11-06

Assigner: JetBrains s.r.o.

Description
In JetBrains IntelliJ IDEA before 2026.3 code execution was possible in Safe Mode via UI Designer form file

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Meta Information

Published
2026-11-06
Last Modified
2026-11-06
Generated
2026-11-06
AI Q&A
2026-11-06
EPSS Evaluated
N/A
NVD
CVE-2026-123838
EUVD
EUVD-2026-118341

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
JetBrains IntelliJ IDEA From 0 (inc) to 2026.3 (exc)

Helpful Resources

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 IntelliJ IDEA before 2026.3 allows code execution in Safe Mode through a UI Designer form file. Safe Mode is intended to restrict execution to trusted code, but this flaw bypasses that restriction.

Impact Analysis

An attacker could exploit this to run malicious code on your system even when IntelliJ IDEA is in Safe Mode. This could lead to data theft, system compromise, or further network attacks if the attacker gains control.

Compliance Impact

This vulnerability could lead to unauthorized code execution, potentially violating GDPR (data protection) or HIPAA (health data security) by exposing sensitive data. Compliance may require patching to mitigate risks.

Mitigation Strategies

Update JetBrains IntelliJ IDEA to version 2026.3 or later to address the vulnerability. Avoid using Safe Mode for untrusted files until the update is applied.

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