Inclusion of Functionality from Untrusted Control Sphere in IntelliJ IDEA - CVE-2026-123304
Published: November 6, 2026
Vulnerability identifier: #VU159670
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-123304
CWE-ID: CWE-829
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to inclusion of functionality from an untrusted control sphere in IntelliJ IDEA's ShellCheck integration when processing untrusted projects. A remote attacker can supply a project with a malicious project-configured ShellCheck path to execute arbitrary code.
Affected software
IntelliJ IDEA
How to mitigate CVE-2026-123304
Install security update from vendor's website.
IntelliJ IDEA - update to 2026.3