CVE-2026-123840
Received Received - Intake

HTML Injection in JetBrains IntelliJ IDEA Remote Development

Publication date: 2026-11-06

Last updated on: 2026-11-06

Assigner: JetBrains s.r.o.

Description
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs

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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-2026-123840
EUVD
EUVD-2026-118343

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-80 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

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Executive Summary

This vulnerability involves HTML injection in Remote Development editor tabs of JetBrains IntelliJ IDEA before version 2026.3. An attacker could potentially inject malicious HTML code into these tabs, which might be executed when viewed by a user.

Impact Analysis

The impact includes potential unauthorized actions on behalf of the user, such as stealing sensitive data or performing actions without consent. It may also lead to phishing attacks or session hijacking if the injected HTML includes malicious scripts.

Compliance Impact

This vulnerability could lead to data breaches, which may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information. Non-compliance could result in legal penalties or reputational damage.

Mitigation Strategies

Update JetBrains IntelliJ IDEA to version 2026.3 or later to address the hTML injection vulnerability in Remote Development editor tabs.

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