What is CVE-2026-100272?

CVE-2026-100272 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.9/10. Published 2026-09-30.

How severe is CVE-2026-100272?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Auth bypass in Jetbrains Youtrack

CVE-2026-100272

In JetBrains YouTrack before 2026.2.19197 missing authorisation in the notification template preview allowed Project Administrators to read restricted issues

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-09-30 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/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 Youtrack

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-2026-100272?: CVE-2026-100272 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.9/10. Published 2026-09-30.
How severe is CVE-2026-100272?: Medium severity. CVSS v3 base score is 4.9 out of 10.