CVE-2026-59791: CWE-1021 in JetBrains YouTrack
In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible
AI Analysis
Technical Summary
CVE-2026-59791 describes a CSS injection vulnerability in JetBrains YouTrack affecting versions prior to 2026.2.17012. The vulnerability arises from the Mermaid diagram rendering feature, which allows injection of CSS code. The CVSS 3.1 score is 3.5 (low), indicating a network attack vector with low complexity, requiring low privileges and user interaction, and resulting in integrity impact only. No vendor advisory or patch information is available at this time.
Potential Impact
The vulnerability allows an attacker with low privileges and requiring user interaction to inject CSS code via Mermaid diagrams, potentially altering the appearance or behavior of the YouTrack interface. There is no impact on confidentiality or availability. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution when rendering Mermaid diagrams from untrusted sources.
CVE-2026-59791: CWE-1021 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible
CVSS v3.1
Score 3.5low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-59791 describes a CSS injection vulnerability in JetBrains YouTrack affecting versions prior to 2026.2.17012. The vulnerability arises from the Mermaid diagram rendering feature, which allows injection of CSS code. The CVSS 3.1 score is 3.5 (low), indicating a network attack vector with low complexity, requiring low privileges and user interaction, and resulting in integrity impact only. No vendor advisory or patch information is available at this time.
Potential Impact
The vulnerability allows an attacker with low privileges and requiring user interaction to inject CSS code via Mermaid diagrams, potentially altering the appearance or behavior of the YouTrack interface. There is no impact on confidentiality or availability. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution when rendering Mermaid diagrams from untrusted sources.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-07-07T09:41:06.835Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a51062b68715ace43b84817
Added to database: 07/10/2026, 14:48:11 UTC
Last enriched: 07/10/2026, 15:04:28 UTC
Last updated: 08/23/2026, 22:52:12 UTC
Views: 88
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