YouTrack XSS via Project/Org Icon Uploads (pre2026.2.18634)
CVE-2026-86491 Published on September 7, 2026
In JetBrains YouTrack before 2026.2.18634 stored XSS was possible via project and organization icon uploads
Vulnerability Analysis
CVE-2026-86491 can be exploited with network access, requires user interaction and user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-86491 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-86491
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Affected Versions
JetBrains YouTrack:- Before 2026.2.18634 is affected.