CVE-2026-100275
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Stored XSS in JetBrains YouTrack Workflow Error Notification

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.19197 stored XSS in the workflow error notification toast was possible

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-100275
EUVD
EUVD-2026-90019

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.19197 (exc)

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Exploitability

CWE
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KEV
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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 2026.2.19197. It allows malicious scripts to be stored in the workflow error notification toast, which can execute when viewed by users.

Impact Analysis

An attacker could exploit this to steal user sessions, perform actions on behalf of users, or deface the application. Users with access to the affected system are at risk of unauthorized actions or data exposure.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements or HIPAA's safeguards for protected health information. Compliance may be compromised if user data is exposed.

Mitigation Strategies

Update JetBrains YouTrack to version 2026.2.19197 or later to address the stored XSS vulnerability in workflow error notifications.

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