CVE-2026-59791
Undergoing Analysis Undergoing Analysis - In Progress

CSS Injection in JetBrains YouTrack via Mermaid Diagram Rendering

Publication date: 2026-07-10

Last updated on: 2026-07-10

Assigner: JetBrains s.r.o.

Description
In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible

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Meta Information

Published
2026-07-10
Last Modified
2026-07-10
Generated
2026-07-10
AI Q&A
2026-07-10
EPSS Evaluated
N/A
NVD
CVE-2026-59791
EUVD
EUVD-2026-42909

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jetbrains youtrack to 2026.2.17012 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-1021 The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.

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Executive Summary

This vulnerability exists in JetBrains YouTrack versions before 2026.2.17012 and involves a cross-site scripting (cSS) injection through the rendering of Mermaid diagrams.

Impact Analysis

The vulnerability allows an attacker with low privileges and requiring user interaction to inject malicious code via Mermaid diagram rendering, which can lead to limited integrity impact but no confidentiality or availability impact.

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