Vulnerability in Jetbrains Intellij Idea

CVE-2026-123839

In JetBrains IntelliJ IDEA before 2026.3 opening arbitrary URLs without confirmation was possible via the Remote Development port forwarding model

Published 2026-11-06 · last modified 2026-11-06.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Jetbrains Intellij Idea

Weakness classification (CWE)

CWE-357

References

www.jetbrains.com/privacy-security/issues-fixed/

Frequently asked questions

What is CVE-2026-123839?: CVE-2026-123839 is a medium-severity vulnerability in Jetbrains Intellij Idea, classified under CWE-357. CVSS score: 4.7/10. Published 2026-11-06.
How severe is CVE-2026-123839?: Medium severity. CVSS v3 base score is 4.7 out of 10.