Vulnerability · Published Nov 6, 2026 · Assigned by JetBrains
CVE-2026-123306
High 7.4
In plain English
A high-severity improper certificate validation in IntelliJ IDEA from JetBrains. There are no confirmed reports of exploitation so far.
Severity (CVSS 3.1)7.4High
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 improper checks allowed server certificates to be added to the trust store during headless runs
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| JetBrains | IntelliJ IDEA | 0 – before 2026.3 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N