What is CVE-2026-123834?

CVE-2026-123834 is a high-severity vulnerability in Jetbrains Datalore, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2026-11-06.

How severe is CVE-2026-123834?

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

Auth bypass in Jetbrains Datalore

CVE-2026-123834

In JetBrains Datalore before 2026.4 improper scope validation in database tasks allowed using another workspace's service account

Vulnerability class: IDOR (Insecure Direct Object Reference)

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/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 Datalore

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

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

Frequently asked questions

What is CVE-2026-123834?: CVE-2026-123834 is a high-severity vulnerability in Jetbrains Datalore, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2026-11-06.
How severe is CVE-2026-123834?: High severity. CVSS v3 base score is 7.5 out of 10.