What is CVE-2026-123294?

CVE-2026-123294 is a critical-severity vulnerability in Jetbrains Hub, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 9.6/10. Published 2026-11-06.

How severe is CVE-2026-123294?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Jetbrains Hub

CVE-2026-123294

In JetBrains Hub before 2026.2.52556 privilege escalation was possible by changing email authentication details during the verification flow

Vulnerability class: Mass Assignment

Published 2026-11-06 · last modified 2026-11-07.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (38.3th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.3% 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 Hub

Weakness classification (CWE)

CWE-915 — Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

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

Frequently asked questions

What is CVE-2026-123294?: CVE-2026-123294 is a critical-severity vulnerability in Jetbrains Hub, classified under Improperly Controlled Modification of Dynamically-Determined Object Attributes. CVSS score: 9.6/10. Published 2026-11-06.
How severe is CVE-2026-123294?: Critical severity. CVSS v3 base score is 9.6 out of 10.