CVE-2026-123840
MEDIUMCVSS 4.7/10
Last modified
CVE-2026-123840 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs.
Description
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| JetBrains | IntelliJ IDEA | < 2026.3 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-123840?
In JetBrains IntelliJ IDEA before 2026.3 hTML injection was possible in Remote Development editor tabs
How severe is CVE-2026-123840?
CVE-2026-123840 has a CVSS score of 4.7/10 (MEDIUM severity).
How do I fix CVE-2026-123840?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-123840?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST