What is CVE-2026-123323?

CVE-2026-123323 is a high-severity vulnerability in Jetbrains Youtrack, classified under Missing Authorization. CVSS score: 8.4/10. Published 2026-11-06.

How severe is CVE-2026-123323?

High severity. CVSS v3 base score is 8.4 out of 10.

Auth bypass in Jetbrains Youtrack

CVE-2026-123323

In JetBrains YouTrack before 2025.3.170763, 2026.1.14150, 2026.2.19656 improper URL validation in the app widget host allowed apps to send REST requests without user confirmation

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/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 Youtrack

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

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

Frequently asked questions

What is CVE-2026-123323?: CVE-2026-123323 is a high-severity vulnerability in Jetbrains Youtrack, classified under Missing Authorization. CVSS score: 8.4/10. Published 2026-11-06.
How severe is CVE-2026-123323?: High severity. CVSS v3 base score is 8.4 out of 10.