Unauthenticated Connection Vulnerability in JetBrains IntelliJ IDEA
CVE-2026-123307

6.8MEDIUM

Key Information:

Vendor

Jetbrains
Status
Intellij Idea
Vendor
CVE Published:
6 November 2026

What is CVE-2026-123307?

In JetBrains IntelliJ IDEA versions earlier than 2026.3 and 2026.2.4, a vulnerability exists that allows unauthenticated connections to arbitrary hosts via run configurations. This flaw could potentially lead to unauthorized access and exploitation of internal network resources.

Affected Version(s)

IntelliJ IDEA 0 < 2026.3, 2026.2.4

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.