CVE-2026-59791

CSS Injection via Mermaid Diagrams in YouTrack

Published Jul 10, 2026 CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
Description
In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title CSS Injection via Mermaid Diagrams in YouTrack
Type Values Removed Values Added
Title CSS injection via Mermaid diagram rendering in JetBrains YouTrack
Type Values Removed Values Added
Title CSS injection via Mermaid diagram rendering in JetBrains YouTrack
Type Values Removed Values Added
Title CSS Injection via Mermaid Diagram Rendering in JetBrains YouTrack
Type Values Removed Values Added
Title CSS Injection via Mermaid Diagram Rendering in JetBrains YouTrack
Type Values Removed Values Added
Title YouTrack CSS Injection via Mermaid Diagram Rendering
Type Values Removed Values Added
Title YouTrack CSS Injection via Mermaid Diagram Rendering
Type Values Removed Values Added
Title CSS Injection via Mermaid Diagram Rendering in JetBrains YouTrack
Type Values Removed Values Added
Title CSS Injection via Mermaid Diagram Rendering in JetBrains YouTrack
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack
Type Values Removed Values Added
Description In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible
Weaknesses CWE-1021
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JetBrains
Published
Updated
Jul 10, 2026, 5:00 PM
Reserved
Jul 7, 2026, 9:41 AM
Status
Analyzed
Published
Jul 10, 2026, 3:16 PM
Modified
Oct 24, 2026, 11:10 PM