What is CVE-2026-123856?

CVE-2026-123856 is a medium-severity vulnerability in Jetbrains Toolbox App, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-11-06.

How severe is CVE-2026-123856?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Jetbrains Toolbox App

CVE-2026-123856

In JetBrains Toolbox App before 3.6.1 nTLM hash disclosure was possible via SVG tool icons from a Remote Development server

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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 Toolbox App

Weakness classification (CWE)

CWE-522 — Insufficiently Protected Credentials

References

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

Frequently asked questions

What is CVE-2026-123856?: CVE-2026-123856 is a medium-severity vulnerability in Jetbrains Toolbox App, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-11-06.
How severe is CVE-2026-123856?: Medium severity. CVSS v3 base score is 6.5 out of 10.