CVE-2026-86491
Received Received - Intake

Stored XSS in JetBrains YouTrack

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: JetBrains s.r.o.

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

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-86491
EUVD
EUVD-2026-72507

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.18634 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product 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.

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Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in JetBrains YouTrack versions before 2026.2.18634. It allows attackers to upload malicious scripts via project or organization icon files, which are then stored and executed when other users view the affected pages.

Impact Analysis

An attacker could exploit this to steal session cookies, perform actions on behalf of users, or deface the application. Users with access to the system may unknowingly trigger the malicious script when viewing icons, leading to potential data breaches or unauthorized actions.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection principles or HIPAA's security requirements. Organizations may face compliance violations, fines, or reputational damage if exploited.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.18634 or later to address the stored XSS vulnerability in project and organization icon uploads.

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