CVE-2026-123840: Security vulnerability

Published Nov 6, 2026

Updated

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

Event History

Nov 6, 2026

CVE Published

via MITRE·04:10 PM

Data Sourced

via MITRE·04:10 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·05:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Which environments should be prioritized for review?

IntelliJ IDEA installations used with Remote Development and editor tabs should be prioritized, because the issue affects Remote Development editor tabs in versions before 2026.3.

How can I determine whether an installation is affected?

Check the IntelliJ IDEA version. Versions before 2026.3 are affected; version 2026.3 is not identified as affected by the provided information.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.