CVE-2026-123848 · Other
NO FIX YET · SEE WHAT TO DO
IntelliJ IDEA before 2026.3 does not verify that a server's TLS certificate matches the host name it connects to. An attacker who can intercept the network path could impersonate the server and read or alter the traffic.
first public Nov 6, 2026 · 1 source
Check it with your coding agent
It checks your repository and tells you if you’re affected, with the fix.
Developers running IntelliJ IDEA builds older than 2026.3 are exposed when they connect to servers over TLS. The sources do not say which features or connections are affected, so the exposure is likely limited to those on an untrusted network path. Teams that already run 2026.3 or later can skip it.
Not affected if version-2026.3-or-later
Who cares developer-tools, intellij-idea, java, jetbrains
2026.32026.3 or later (per the NVD description: before 2026.3 is affected)In JetBrains IntelliJ IDEA before 2026.3 host name verification was missing for server TLS certificates
This page as .md · .json · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Are you affected?
Tell InfraStack what you run. It checks this one, and every next one, against your stack.
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.