CVE-2026-123307 · Package
NO FIX YET · SEE WHAT TO DO
Before IntelliJ IDEA 2026.3 and 2026.2.4, run configurations could make the IDE connect to an arbitrary host without authentication. An attacker who can supply a run configuration can use the IDE to reach hosts of their choosing.
first public Nov 6, 2026 · 1 source
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Developers who run IntelliJ IDEA versions before 2026.3 or 2026.2.4 and open projects with run configurations from untrusted sources. The sources do not describe the exact conditions, so the team should confirm the trigger before deciding urgency. Teams that only use patched versions can skip it.
Not affected if patched-version
Who cares developer-workstation, intellij-idea, jetbrains
idea --version if available.2026.3 or 2026.2.4.2026.3 or 2026.2.4.In JetBrains IntelliJ IDEA before 2026.3, 2026.2.4 unauthenticated connection to an arbitrary host via run configurations was possible
This page as .md · .json · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
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