CVE-2026-123844 · Package
NO FIX YET · SEE WHAT TO DO
IntelliJ IDEA before 2026.3 could be made to send server-side requests to addresses an attacker chooses through custom plugin repository settings. An attacker could use the IDE to reach internal services the developer's machine can see.
first public Nov 6, 2026 · 1 source
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Developers who run IntelliJ IDEA older than 2026.3 and have custom plugin repositories configured are the ones exposed. Users who only use the default JetBrains plugin repository are less exposed. The sources do not say more about the exact conditions.
Not affected if default-plugin-repository-only, version-2026.3-or-later
Who cares ide, intellij-idea, java, jetbrains
2026.3 are affected.2026.3 or later.In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
This page as .md · .json · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
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