What is CVE-2026-123305?

CVE-2026-123305 is a high-severity vulnerability in Jetbrains Intellij Idea, classified under Relative Path Traversal. CVSS score: 7.5/10. Published 2026-11-06.

How severe is CVE-2026-123305?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Jetbrains Intellij Idea

CVE-2026-123305

In JetBrains IntelliJ IDEA before 2026.3 path traversal was possible via unpacking Dev Container archives from a remote host

Published 2026-11-06 · last modified 2026-11-07.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

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-23 — Relative Path Traversal

References

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

Frequently asked questions

What is CVE-2026-123305?: CVE-2026-123305 is a high-severity vulnerability in Jetbrains Intellij Idea, classified under Relative Path Traversal. CVSS score: 7.5/10. Published 2026-11-06.
How severe is CVE-2026-123305?: High severity. CVSS v3 base score is 7.5 out of 10.