What is CVE-2026-86491?

CVE-2026-86491 is a low-severity vulnerability in Jetbrains Youtrack, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-09-07.

How severe is CVE-2026-86491?

Low severity. CVSS v3 base score is 3.5 out of 10.

XSS in Jetbrains Youtrack

CVE-2026-86491

In JetBrains YouTrack before 2026.2.18634 stored XSS was possible via project and organization icon uploads

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.

Affected products

Jetbrains Youtrack

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@jetbrains.com

Frequently asked questions

What is CVE-2026-86491?: CVE-2026-86491 is a low-severity vulnerability in Jetbrains Youtrack, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-09-07.
How severe is CVE-2026-86491?: Low severity. CVSS v3 base score is 3.5 out of 10.