CVE-2026-123838 · Runtime
NO FIX YET · SEE WHAT TO DO
In JetBrains IntelliJ IDEA before 2026.3, a crafted UI Designer form file could make the IDE execute code even while it was in Safe Mode. An attacker who gets a developer to open such a file in the IDE can run code as that developer.
first public Nov 6, 2026 · 1 source
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Developers who open projects or files from untrusted sources in IntelliJ IDEA versions before 2026.3. The sources do not describe other configurations; Safe Mode was expected to block this and did not.
Not affected if only-trusted-projects, version-2026.3-or-later
Who cares intellij-idea, java, jetbrains, kotlin
2026.3 are in scope.2026.3 or later (per the sources' description: fixed in 2026.3).In JetBrains IntelliJ IDEA before 2026.3 code execution was possible in Safe Mode via UI Designer form file
This page as .md · .json · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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