What is CVE-2026-123283?

CVE-2026-123283 is a medium-severity vulnerability in Jetbrains Datalore, classified under CWE-1464. CVSS score: 6.8/10. Published 2026-11-06.

How severe is CVE-2026-123283?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Jetbrains Datalore

CVE-2026-123283

In JetBrains Datalore before 2026.4 account takeover was possible via SSO sign-in to a pre-registered account

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

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.5th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Jetbrains Datalore

Weakness classification (CWE)

CWE-1464

References

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

Frequently asked questions

What is CVE-2026-123283?: CVE-2026-123283 is a medium-severity vulnerability in Jetbrains Datalore, classified under CWE-1464. CVSS score: 6.8/10. Published 2026-11-06.
How severe is CVE-2026-123283?: Medium severity. CVSS v3 base score is 6.8 out of 10.