Vulnerability · Published Nov 6, 2026 · Assigned by JetBrains
CVE-2026-123853
High 7.8
In plain English
A high-severity security flaw in IntelliJ IDEA from JetBrains. There are no confirmed reports of exploitation so far.
Severity (CVSS 3.1)7.8High
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, 2026.2.2 code execution was possible in Safe Mode via project-controlled JVM options of the build process
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| JetBrains | IntelliJ IDEA | 0 – before 2026.3, 2026.2.2 |
Weakness: CWE-829 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H