What is CVE-2026-123855?

CVE-2026-123855 is a high-severity vulnerability in Jetbrains Toolbox App, classified under OS Command Injection. CVSS score: 7.5/10. Published 2026-11-06.

How severe is CVE-2026-123855?

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

RCE in Jetbrains Toolbox App

CVE-2026-123855

In JetBrains Toolbox App before 3.6.1 command injection was possible via enterprise configuration URLs

Vulnerability class: Command Injection (OS Command Injection)

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 Toolbox App

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

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

Frequently asked questions

What is CVE-2026-123855?: CVE-2026-123855 is a high-severity vulnerability in Jetbrains Toolbox App, classified under OS Command Injection. CVSS score: 7.5/10. Published 2026-11-06.
How severe is CVE-2026-123855?: High severity. CVSS v3 base score is 7.5 out of 10.