What is CVE-2026-123287?

CVE-2026-123287 is a medium-severity vulnerability in Jetbrains Datalore, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2026-11-06.

How severe is CVE-2026-123287?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Jetbrains Datalore

CVE-2026-123287

In JetBrains Datalore before 2026.4 private notebook files could be downloaded without authentication via published interactive reports

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 Datalore

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

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

Frequently asked questions

What is CVE-2026-123287?: CVE-2026-123287 is a medium-severity vulnerability in Jetbrains Datalore, classified under Incorrect Authorization. CVSS score: 5.9/10. Published 2026-11-06.
How severe is CVE-2026-123287?: Medium severity. CVSS v3 base score is 5.9 out of 10.