What is CVE-2026-100260?

CVE-2026-100260 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Initialization of a Resource with an Insecure Default. CVSS score: 5.3/10. Published 2026-09-30.

How severe is CVE-2026-100260?

Medium severity. CVSS v3 base score is 5.3 out of 10.

RCE in Jetbrains Youtrack

CVE-2026-100260

In JetBrains YouTrack before 2026.2.18991 mailbox integration allowed authentication after a password reset

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-1188 — Initialization of a Resource with an Insecure Default

References

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

Frequently asked questions

What is CVE-2026-100260?: CVE-2026-100260 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Initialization of a Resource with an Insecure Default. CVSS score: 5.3/10. Published 2026-09-30.
How severe is CVE-2026-100260?: Medium severity. CVSS v3 base score is 5.3 out of 10.