XSS in Jetbrains Youtrack

CVE-2026-86484

In JetBrains YouTrack before 2026.2.18634 angularJS template injection in assignee names led to stored XSS

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (50.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-86484: held from 0.004 to 0.006.

EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-86484?
CVE-2026-86484 is a medium-severity vulnerability in Jetbrains Youtrack, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2026-09-07.
How severe is CVE-2026-86484?
Medium severity. CVSS v3 base score is 4.6 out of 10.