Vulnerability · Published Nov 6, 2026 · Assigned by JetBrains
CVE-2026-123278
Medium 6.7
In plain English
A medium-severity missing authentication in IntelliJ IDEA from JetBrains. There are no confirmed reports of exploitation so far.
Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)–no EPSS score yet
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In JetBrains IntelliJ IDEA before 2026.3 code execution was possible via the unauthenticated JDBC worker RMI endpoint
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| JetBrains | IntelliJ IDEA | 0 – before 2026.3 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H